The first attack killed two pro-government tribal elders in Chamarkand village, 45 kilometres (28 miles) northwest of Khar, the main town of in Bajaur district at around 8.30am (0330 GMT), local government official Tariq Khan told AFP.
The second bomb exploded 10 minutes later after security forces arrived and began a search operation to find the culprits, Khan said.
"Two paramilitary soldiers and one tribal policeman were killed in the second bomb blast," he said.
Another government official, Adalat Khan, confirmed the bombings and casualties.
There was no immediate claim of responsibility, but tribal elders supporting military operations against local Taliban fighters are frequently attacked.
Bajaur saw major anti-Taliban offensives in August 2008 and February 2009, and the military has repeatedly declared the district secure.
Pakistan has battled homegrown insurgents in the tribal belt for years. More than 3,000 soldiers have died but Pakistan has resisted US pressure to do more to eliminate havens used by insurgents fighting the Americans in Afghanistan. (*)
Editor: Kunto Wibisono
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