JALALABAD: Afghan security forces battled a group of attackers who stormed a government building in the eastern city of Jalalabad for hours on Sunday after a coordinated assault that killed at least nine people and wounded dozens, local officials said.

After a car bomb was detonated at the entrance to the state accounts office, a group of about four gunmen, armed with machine guns and rocket propelled grenades, rushed the building, the officials said. There were multiple blasts as they fought off security forces in a gunbattle that lasted much of the day.

The attack took place in a busy area of the city with many other official buildings nearby, including a school in which around 1,000 girls were trapped as the fighting raged. There was no immediate claim of responsibility.

It was the latest in a series of high-profile attacks that have killed and wounded hundreds of civilians in Afghanistan this year and put heavy pressure on the Western-backed government of President Ashraf Ghani.

Most have been in the capital Kabul, but in January gunmen attacked an office of aid group Save the Children in Jalalabad, killing at least five people and wounding 25. That attack, claimed by Islamic State, followed much the same pattern as Sunday’s incident.

After several hours of fighting which sent plumes of smoke rising into the sky above the accounts office, Attahullah Khogyani, a spokesman for the provincial governor, said Sunday’s clash had ended with all the gunmen killed.

Public health officials said at least nine people, including a child, had been killed and 36 wounded. Witnesses said the explosions had caused carnage among passers-by.

“I saw two rickshaw drivers on the ground with their arms blown off,” said Khan Mohammad, a local resident who saw the initial blasts and the start of the gunbattle.

Violence has escalated across Afghanistan since the announcement of the Taliban’s annual spring offensive last month and there have been heightened security fears around preparations for elections in October.

Dozens of people have been killed in voter registration centres in recent weeks, leading to fears that people could stay away from the elections, seen as a major test of the government’s credibility.

At the same time, Taliban fighters have stepped up the pressure on government forces across the country, from Baghlan province in the north, where they seized a district centre last week, to Farah in the southwest or Ghazni, south of Kabul.

Last year, the United States increased its support to struggling Afghan forces, announcing plans for thousands of additional advisers and more air strikes in a bid to force the Taliban to enter peace negotiations.