Police in northwestern Pakistan say a roadside bomb has killed a senior bomb disposal officer and two members of his team.
Authorities said the explosion took place early Monday in Peshawar, as Abdul Haq and two aides were on their way to defuse a bomb in another part of the city.
There was no immediate claim of responsibility for the attack.
Militants have been responsible for a number of attacks in Peshawar and elsewhere in Khyber-Pakhtunkhwa province, which border Pakistan's restive tribal region.
Last year, a senior officer was killed in Peshawar while trying to defuse a bomb.