Karachi, Pakistan (BBN)-Attackers managed to flee as a heavy contingent of security forces reached Airport Security Force (ASF) camp number 2, which came under a fresh attack on Tuesday, DawnNews reported.

A security sweep and search operation is underway at the ASF academy, which is located in Bhitai Abad, Pehlwan Goth in Karachi.

Heavy firing was reported at the ASF camp in the metropolis on Tuesday after unidentified men entered the premises.

Initial reports suggest that the number of attackers could be between four and seven, DawnNews added.

DawnNews reported that explosions were also heard, causing panic among citizens in the vicinity.

The Director General of Rangers has reached the site to oversee the operation.

The camp is situated near the Jinnah International Airport which the Civil Aviation Authority (CAA) had cleared on Monday after a long battle between security forces and terrorists left 28 dead.

A Twitter account allegedly operated by Omar Khorasani of the Tehreek-i-Taliban Pakistan (TTP) Mohmand faction tweeted on Tuesday that the group has carried out this second attack.

BBN/ANS-10June14-2:40pm (BST)