Eight soldiers were killed and seven police officers kidnapped in separate attacks in northwest Pakistan, police and intelligence officials have told AFP.

A Monday clash resulted in the deaths of "eight soldiers" and "nine militants" in the Tirah area of Khyber-Pakhtunkhwa province, an intelligence officer said on condition of anonymity.

Tehrik-i-Taliban Pakistan (TTP) terrorist group claimed responsibility.

In a separate attack in the province, "seven police officers were kidnapped" at a checkpoint, said a senior police official, also speaking anonymously.

"The assailants also seized the weapons belonging to the officials," he added.

Another police official, Muhammad Zia ud-Din, confirmed the incident.

The group killed 10 police officers on October 25.

On Saturday, seven soldiers were killed by separatists in Pakistan's southwest Balochistan province, a week after a bombing by the same group killed 26 people, including 14 soldiers, at a train station in the provincial capital.