A bomb has exploded near a police station in central Bosnia, killing one officer and injuring at least five others, police say.
The bomb caused extensive damage in the town of Bugojno, about 75km (45 miles) north-west of Sarajevo.
Security Minister Sadik Ahmetovic said it was a "terrorist act". Police say at least five people have been arrested in connection with the blast.
Correspondents say it is unclear if a device was planted or thrown.
"One policeman died of injuries, while six others were wounded, one of them seriously," a police official told the AFP news agency .
The Bosnian national television channel, BHT, said one of those arrested was a man who confessed to planting the device.
It said that the suspect was a member of the radical Islamic Wahabbi movement which is active in Bosnia and that he is already known by police for previous crimes.
The prosecutor's office could not immediately confirm the report.
The blast was condemned by Haris Silajdzic, the Muslim member of Bosnia's joint presidency, who described it as "direct attack on the security, constitutional order and international position" of Bosnia.
Correspondents say that hundreds of Islamic fighters - many of them Wahhabis - joined Bosnian Muslim troops during the 1992-1995 Bosnian war.