Gunmen shot dead four police in Pakistan's western city of Quetta, and two other officers were killed by a suicide bomber in Peshawar on Thursday.
It has been the deadliest week for the force in Quetta, the capital of Baluchistan province, for nearly two years as four police were also killed in the city on Saturday.
Quetta police chief Abdul Razzak Cheema said: "It was first time that eight policemen have been killed by armed men in just one week."
In the northern city of Peshawar, a bomber killed two police and seriously wounded six, including a deputy police commander, when he crashed his explosive-laden motorcycle into a police motorcade.
The blast occurred near deputy commander Malik Tariq's vehicle in the city's Hayatabad area when he was on his way to office, Dawn online reported.
The Pakistani Taliban claimed responsibility for the Peshawar attack, but no one claimed responsibility for the Quetta one.
Pakistan’s restive southwestern Balochistan province has long been plagued by sectarian and separatist violence. Baloch separatists fight against the government forces demanding greater autonomy and control over the province’s gas and mineral resources.
Baluchistan is the largest of Pakistan's four provinces, but residents have long complained they do not receive a fair share of the province’s wealth.