More than 5,000 people have been arrested following Easter Sunday's suicide bombing in Pakistan, a provincial minister has said, Sky News reported.
Seventy-three people were killed and hundreds more injured in the blast in the eastern city of Lahore. Many of the victims were children.
Of the thousands arrested, 212 people remained in custody.
"More than 5,000 people were searched and interrogated and most of them were allowed to go, but some 216 have been apprehended for further investigations," Rana Sanaullah told reporters.
He said at least 160 raids had been carried out by police, counter-terrorism and intelligence agents.
The bombing happened near a children's play area in a park as families were out enjoying a warm Easter Sunday.
It was claimed by the Jamaat-ul-Ahrar faction of the Pakistani Taliban, whose official name is Tehreek-i-Taliban Pakistan (TTP).
A spokesman for the group said it had targeted Christians, a minority community in the mainly Muslim Pakistan.
The militants have since sent taunting tweets to Pakistan's Prime Minister, Nawaz Sharif, saying war has "reached his doorstep".
Ehansullah Ehsan, spokesman for the Jamaat-ul-Ahrar, tweeted: "After the Lahore attack, Nawaz Sharif repeated old words to give himself false assurances.
"Nawaz Sharif should know that war has reached his doorstep, and God willing the mujahideen will be the winners in this war."
In a televised address on Monday, Mr Sharif pledged to avenge the attack..
"Terrorists cannot dent our resolve. Our struggle will continue until the complete elimination of the menace of terrorism," he said.