Gunmen opened fire on a police patrol, killing four officers and wounding three others in northwestern Pakistan on Tuesday.
According to reports, six to seven men were waiting at a local tea stall before they opened fire at the vehicle.
No group has claimed responsibility for the attack so far.
It's the first major attack in Dera Ismail Khan district since a political candidate was killed in the lead-up to Pakistan's general election in July.

Qatar Airways to run limited flights to Doha as airspace closure continues
Three injuries and material damage to a university building in Bahrain
Iranian President says remarks 'misinterpreted' as Gulf strikes continue
Explosion hits US embassy in Oslo, causing minor damage, thick smoke
Four killed in Beirut hotel strike, Israel says it targeted Iranian commanders
