Pakistani law enforcement agencies on Wednesday launched a massive crackdown in neighbourhoods of Lahore with sizeable Afghan and Pathan populations and took over 400 people into custody, officials said.
"Raids are being carried out on the basis of specific and general information about terror suspects and so far we have taken a large number of Afghans and Pathans into custody," Senior Superintendent of Police (Operations) Chaudhry Shafiq Ahmed said.
Most of the arrested people did not have computerised national identity cards, they said.
Police in other Pakistani cities, including Peshawar, Rawalpindi and Islamabad, have initiated similar crackdowns over the past few days where hundreds of suspects have been rounded up.
The crackdown was launched after a wave of suicide attacks blamed on the Tehrik-e-Taliban Pakistan.
After an attack on the police training school at Manawan on the outskirts of Lahore in March this year, police had launched a similar crackdown on Afghan shanties and arrested over 500 people. The police had to free almost all of them later because no charges were brought against them.