Naseer and his associates had conspired to wage war against the government of India and also to kill Indians in order to destabilise the country and create communal disharmony, it said.
Nicholas Young, 36, facing a statutory maximum sentence of 20 years in prison, was employed as an officer as Metro Transit Police Department since 2003.
The Scotland Yard's Indian-origin deputy assistant commissioner, Neil Basu, in a statement said Khalid Masood's attack had echoes of the rhetoric of the Islamic State but no evidence at this stage suggests he was linked to the group.
The 2 Indians have been brought back safely to University of Sirte and efforts were continuing for the remaining two.
The 23-year-old youth from Kalyan in neighbouring Thane landed in Mumbai on November 28 last year after returning from IS.
Foreign ministers from 22 countries on Thursday gathered in the London to discuss ways to coordinate their efforts to combat the Islamic State by halting the flow of recruits to the jihadist group and cutting off its funding.
His associate Anurag Singh alias Rehan of Panipat got converted to Islam, while his wife is a Bangladeshi national, he added.
A man identified as Amedy Coulibaly, who took hostages at a kosher supermarket on Friday and killed a policewoman a day earlier, claimed to be a member of the terror outfit -- Islamic State -- in a video that was released on the Internet on Sunday.
The Islamic State has claimed responsibility for the attack. According to US monitor SITE Intelligence Group, the extremist group's propaganda outlet AMAQ claimed that the executors of the attack were soldiers of the Islamic State.
A gunman holding hostages at a popular cafe in Sydney has demanded delivery of an Islamic State flag and a conversation with Australian Prime Minister Tony Abbott, a media report said on Monday.
IS executioner known as 'Jihadi John' was revealed to be a university graduate from London
Trinidad's Prime Minister Dr Keith Rowley has revealed but asserted that "extra effort in national security preparations and response readiness"
Russia on Wednesday carried out intense rocket strikes targeting the Islamic State in Syria from warships in the Caspian Sea, 1500 km away.
As far as India is concerned, the danger is the potential of the IS to create mischief rather than its actual capability as of now, says Rajiv Kumar
Obama asks Congress to grant war powers; vows defeat of Islamic State.
The terror group vowed to avenge his death.
A man identified as "Al Karar the Iraqi", threatened the 'crusader' nations who are fighting together against the IS and the US capital was specifically singled out.
The early morning crackdown against the terror group in Ballari and Bengaluru in Karnataka, Amaravati, Mumbai and Pune in Maharashtra, Jamshedpur and Bokaro in Jharkhand and Delhi, led to the foiling of a plan by the accused to carry out terror acts, especially improvised explosive device blasts.
The United States has offered rewards amounting to USD 20 million (around Rs 127 crore) for tips on whereabouts of four top leaders of the Islamic State, a day after the terror group claimed responsibility for its first attack on American soil.
Obama said he refused to accept terrorism as the 'new normal' even after the recent attacks in Paris and the subsequent hostage situation at a hotel in Mali.
Pakistan, which is witnessing an influx of Tehreek-i-Taliban terrorists in significant numbers in the restive Khyber Pakhtunkhwa's tribal districts, is also facing a threat from the Islamic State (ISIS) which is trying to establish a foothold in the country, the ministry of interior has said.
The NIA special court, Delhi sentenced them under various sections of Indian Penal Code, Unlawful Activities (Prevention) Act, and Explosive Substances Act, a spokesperson of the federal agency said.
Seven Indians are currently with the Islamic State in Iraq and Syria, just one in a combat role, while six from the country who had joined the dreaded terror network have gone down fighting.
They were motivating impressionable Muslim youths to relocate from their place of residence for strengthening the Padgha base, the spokesperson said.
In an address at a security conclave of the Shanghai Cooperation Organisation in the Kazakh capital, he also underlined the need for holding accountable the sponsors, financiers and facilitators of terrorism, in remarks that came amid Pakistan's continuing support to various terror groups.
Any curious mind, the court observed, can access and download such content from the internet, which, by itself, is not a crime.
The reports were changed by CENTCOM higher ups to adhere to the Obama administration's public line that the US is winning the battle against the terror groups, claim analysts.
British tourists returning from Egypt told to leave luggage behind as airport security is tightened in wake of disaster in Sinai
The Kerala priest was released recently after more than one-and-a-half years in captivity in Yemen.
Eyewitnesses reported hearing a loud "bang" from inside the venue.
Europe will have to make some hard choices if it wishes to take on the militant group responsible for the horrible attacks in Paris.
The Islamic State of Iran and Syria has claimed responsibility for the massive attack on concert hall in the Russian capital, CNN reported.
The recent incident has eroded trust and Chinese social media reflects growing anxiety, with calls for stricter security measures to protect Chinese lives.
A sinister Islamic State-inspired plan to carry out an attack using 'edged knives' at a ceremony commemorating martyred soldiers was foiled on Saturday.
The 15-member body called for enhanced actions, from closing financial system loopholes to stopping the abuse of charitable causes, as well as updating the existing IS and Al Qaeda sanctions list.
The 4000-page chargesheet, which was filed in the court of special NIA judge AK Lahoti, has 16 protected witnesses.
The Delhi Police said it has conducted a thorough check of all schools that received the bomb threat but found nothing.
One of the two Indian teachers from Karnataka, who was kidnapped in Libya, allegedly by the Islamic State terror group and released subsequently, on Tuesday, said they were treated with respect by the abductors and not tortured in captivity.
Identifying Islamic State terrorists as uniquely brutal, United States President Barack Obama has announced that the country will lead a broad coalition to roll back the threat posed by Abu Bakr al-Baghdadi and his militia.
Terror outfit Islamic State is trying to gain a foothold in Pakistan occupied Kashmir, a senior Army official said on Friday.