At least 66 trained extremists of the banned Tehreek-e-Taliban Pakistan (TTP) have reportedly landed in various parts of Sindh, including Karachi to wreak havoc in the region, sources said.

According to The Daily Times, an unidentified person had sent a letter to Sindh Police Inspector General, Sultan Salahuddin Babar Khattak and Sukkur Regional Police Officer ahead of the arrival of sixty-six militants from Wana, South Waziristan.

The letter warned of attacks on sensitive installations, including police training centres in Karachi and the Sindh Assembly building.

Following the threat, security officials have been directed to beef up security in and around all major government buildings and take all possible precautionary measures and make foolproof security arrangements at sensitive locations. (ANI)