At least four people have died after a suspected suicide attack on a police station in eastern Afghanistan.
Police officials in the city of Jalalabad say gun battles started after a “multi-pronged” attack by insurgents.
Reports suggest a suicide car bomber targeted the police station, together with around five gunmen.
A spokesman for the governor of the Nangarhar province said the battle was continuing four hours after the early morning attack started.
The insurgents are believed to have stormed the key police station in the heart of the city, close to government offices and the headquarters of the governor.
Sediq Sediqqi, spokesman for the interior ministry, said that five militants had been killed and the remaining attackers remained holed up inside the police station.
Witnesses and rickshaw drivers in the city told the BBC that the state-run Radio Television Afghanistan was one of many buildings that were still on fire following the attack.