Security forces arrest four from Lahore in connection with Data Darbar bombing.

LAHORE -- Security forces in Lahore picked up four suspects during a late night raid on Thursday in Lahore's Garhi Shahu area soon after agencies investigating the Data Darbar bombing traced the alleged suicide bomber to the locality.

Twelve individuals lost their lives in what officials had described as a suicide bombing targeting an Elite Force van detailed to the security of the Data Darbar shrine on Wednesday.

According to a private TV channel, agencies investigating the bombing said they had identified the motorcycle rickshaw used to transport the suspected bomber to the shrine.

The suspect took the rickshaw from near the railway station. Video footage obtained by the agencies reportedly shows that the rickshaw driver approached the bomber as the latter approached from Garhi Shahu.

Meanwhile, law enforcement agencies said they had shifted their focus to three major terrorist networks of the outlawed Tehreek-i-Taliban Pakistan (TTP) in Punjab to uncover handlers/facilitators of the attack.

Talking about the ongoing investigation into the suicide blast, a senior police officer told a private TV channel, that two high-profile teams had been assigned the task to go after three offshoots of the TTP and their facilitators.

He said the major focus was on Hizbul Ahrar, which had claimed responsibility for sending the teenage suicide bomber to Data Darbar on Wednesday.

He said the law enforcement agencies were using...