Officials in northwest Pakistan say a bomb targeting an adviser of Prime Minister Nawaz Sharif has killed five men in his security detail.
Authorities say the bomb hit the convoy of Amir Mugam Sunday in an area of the Swat Valley.
Mugam was not hurt in the assault. He told the French news agency the strike was the sixth attack against him. He said he would not be deterred from carrying out his political activities.
There has been no immediate claim of responsibility.
The Pakistani Taliban, other militant affiliates and al-Qaida-linked networks all have strongholds in the country's northwest, particularly in the semi-autonomous areas on the Afghan border.
Some information for this report was provided by AP and AFP.