ISLAMABAD, April 18 (Xinhua) -- Four terrorists were killed during a joint operation of security forces and law enforcement agencies in Pakistan's northwest Khyber Pakhtunkhwa province, the military said on Friday.

The intelligence-based operation was conducted in Swat district of the province, the Inter-Services Public Relations (ISPR), the media wing of the Pakistan Army, said in a statement.

Security forces engaged the terrorists at their location, killing all four terrorists, said the ISPR, adding that a huge cache of weapons and ammunition were also recovered from the terrorists' hideout.

The killed were involved in numerous terrorist activities in the area, said the statement. ■