QUETTA: Security forces raided a compound in Quetta and killed four militants linked to an attack on a police academy earlier in the week, officials said Friday.

The raid was carried out late Thursday following an intelligence tip-off about the presence of fighters from the Lashkar-e-Jhangvi (LeJ) militant group. "A team of anti-terrorist force (ATF) raided the compound and killed four militants after an exchange of gunfire," a senior local police official Abdullah Afridi told AFP.

Speaking off the record, a police official said the militants belonged to the LeJ -- a faction of which claimed it had worked with the Islamic State group to carry out the Monday night raid that killed 61 people, the deadliest assault on a security installation in Pakistan's history.

The Balochistan government has also formed a joint investigation team (JIT) comprising officials from the army, police and intelligence agencies to probe Monday's attack. -AFP