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The searches were carried out on June 14-15 at 10 premises in Prayagraj, Lucknow and Delhi, the agency said in a statement.
Mishra was accused of sharing Pal's location from a Prayagraj court before the latter along with two policemen was shot dead on February 24.
The bodies of the two brothers, who were gunned down by three assailants posing as journalists in Prayagraj on Saturday night, were handed over to the family members after conducting the post-mortem examination for performing the last rites.
Jailed gangster and former member of Parliament Atiq Ahmad and his wife on Tuesday joined the All India Majlis e Ittehadul Muslimeen in the presence of its chief Asaduddin Owaisi, drawing a sharp reaction from the Bharatiya Janata Party which said Chief Minister Yogi Adityanath will not allow "Jinnah's jihadi mentality" to flourish in Uttar Pradesh.
Gangster-turned-politician Atiq Ahmad, who is currently in police custody in connection with the Umesh Pal murder case, has sought permission from a magistrate to attend the funeral of his son Asad who was killed in a police encounter.
Ahmad was elected to the assembly as an Independent in 1989, 1991, 1993 and on a Samajwadi Party ticket in 1996. He returned to the House in 2002 on an Apna Dal ticket. He was elected as an MP in 2004.
Immediately after the House met, Lok Sabha Speaker Om Birla paid tributes to sitting MPs Rattan Lal Kataria and Balubhau alias Suresh Narayan Dhanorkar. He also said that 11 former members passed away in the last few months and read out their names.
Ahmad and Ashraf alias Khalid Azim will be kept in judicial custody till April 26, said advocate Vikram Singh, the counsel for Umesh Pal's wife Jaya.
The SC also asked the UP government how the killers got the knowledge that they were being taken to hospital.
It has also sought a status report from the state government on 183 "police encounters" that have taken place since 2017.
The Samajwadi Party on Thursday expelled its MLA Pooja Pal, for alleged anti-party activities, hours after she praised Uttar Pradesh Chief Minister Yogi Adityanath in the assembly for putting gangster-politician Atiq Ahmad to dust.
The Supreme Court on Monday said it would hear on July 14 pleas, including the one filed by the sister of slain gangster-turned-politician Atiq Ahmad and Ashraf, seeking constitution of a commission chaired by a retired apex court judge to inquire into their "custodial" and "extra-judicial deaths".
A few distant relatives of Atiq and some people of the locality were allowed to go to the graveyard.
The state government announced the formation of a two-member judicial enquiry committee to probe the encounter in Jhansi.
A police official said a large number of policemen be deployed during the last rites of Asad to avoid any untoward incident.
It would be better if the Supreme Court takes cognisance of this 'extremely serious and worrisome' incident, which is being discussed across the country, the former Uttar Pradesh chief minister said.
Some serious secrets were about to be revealed, that's why the opposition got him murdered," said Singh, the state animal husbandry and dairy development minister
Atiq Ahmad, 60, and his brother Ashraf were shot dead at point-blank range by three men posing as journalists in the middle of a media interaction while police personnel were escorting them to a medical college in Prayagraj in April.
The latest case was registered at the Dhoomanganj police station on Monday, the official added.
Luvlesh Tiwari (22) of Banda, Mohit, alias Sunny, (23) of Hamirpur and Arun Kumar Maurya (18) of Kasganj were caught on the spot after shooting Atiq and his brother dead outside a hospital in the Shahganj area in Prayagraj on Saturday night.
The assailants -- Mohit alias Sunny (23) of Hamirpur, Lavlesh Tiwari (22) of Banda and Arun Maurya (18) of Kasganj -- were arrested soon after the dramatic shootout outside the Prayagraj hospital where policemen were escorting the brothers for a medical check-up Saturday night.
The Uttar Pradesh government on Sunday constituted a three-member judicial commission to probe into the killing of gangster-politician Atiq Ahmad and his brother Khalid Azeem alias Ashraf.
Several Twitter users made a hashtag of Adityanath's statement as they tweeted about the alleged encounter in Jhansi.
Local Congress leader Rajkumar Singh Rajju was taken into custody by the police on Wednesday after he allegedly placed the tricolour on the grave of gangster-politician Atiq Ahmad, calling him a 'martyr'.
"The murder of Atiq-Ashraf was committed in front of the media. The three shooters are under arrest. We will take them in police remand and all the questions regarding the killing will be answered," DIG, STF, Anand Dev Tiwari told reporters.
The National Human Rights Commission (NHRC) has issued a notice to the Uttar Pradesh Police over the killing of gangster-politician Atiq Ahmad and his brother Ashraf when they were being escorted by police in Prayagraj, officials said on Tuesday.
The three assailants, who were arrested after shooting dead gangster-turned-politician Atiq Ahmed and his brother Ashraf in Prayagraj, confessed to their crime on Sunday, adding that they did it to 'become popular'.
Gangster-politician Atiq Ahmad on Wednesday claimed that he was being harassed in the Sabarmati Central Jail in Gujarat.
A letter by Atiq Ahmed with instructions to send it to the Uttar Pradesh chief minister and the Chief Justice of India in case of his death is being dispatched to them, the slain gangster-turned-politician's lawyer said on Tuesday.
According to the July 3 cause list uploaded on the apex court website, a bench of Justices S R Bhat and Aravind Kumar will hear the petition filed by advocate Vishal Tiwari
Uttar Pradesh Chief Minister Yogi Adityanath convened a high-level meeting in Lucknow and constituted a three-member judicial commission to probe the killings.
Gangster-turned-politician Atiq Ahmad's son Asad, wanted in the Umesh Pal murder case, was killed in an encounter with the Uttar Pradesh police in Jhansi on Thursday, officials said.
The MHA, under the leadership of the prime minister and guidance of Union Home Minister Amit Shah, will prepare the SOPs for the safety and security of journalists, they said.
Without taking names, in a tweet in Hindi, Priyanka Gandhi said the law of the country is written in the Constitution and this law is paramount.
The incident took place at Majalgaon in the district on Tuesday following which many locals gathered around the banner. Authorities promptly took it down, the official said.
Members of the Special Investigation Team (SIT) and the forensic team visited the area outside Colvin Hospital to understand the sequence of events leading to the killing of Ahmad and his brother on the night of April 15.
Congress president Mallikarjun Kharge said there are courts to ensure that criminals get the harshest punishment but 'playing with law and order only gives birth to anarchy'.
In order to ensure qualitative investigation and time-bound action, a three-member team of supervisors has also been formed.
Ten people were named in the first information report (FIR) registered at the Dhoomanganj Police Station of Prayagraj on February 25, a day after Umesh Pal was killed.