At least 27 people were killed and dozens of others were wounded Afghanistan on Thursday in separate Taliban attacks and a suicide bombing targeting security forces.

A suicide bomber walked up to an Afghan police vehicle in Jalalabad, the capital of eastern Nangarhar province, and detonated an explosive device that killed three police and six civilians on Thursday, provincial health department official Shoaib Sahak told the Associated Press. He said another 13 people were wounded, some of the seriously.

Attahullah Khogyani, spokesman for the provincial governor, said security forces were the target of the attack. Several of the injured were police, he said.

No one took immediate responsibility for the attack, but both the Daesh affiliate known as Khorasan Province and the Taliban operate in Nangarhar province, considered a Daesh stronghold.

In the Khwaja Ghar district of the northern Takhar province, a heavy battle left four security forces dead, while another six were wounded, provincial council member Salahuddin Burhani told Deutsche Presse Agentur (dpa).

In Dai Chopan district of southern Zabul, a Taliban attack on a police checkpoint left eight dead and wounded seven others, provincial council member Hashim Gerani said.

Meanwhile, in Oba district of the western Herat province, a clash between Taliban and police left three dead, including one police officer, according to provincial council member Ahmad Karokhi.

Another provincial councilor, Sardar Bahaduri said that Taliban have killed the son of a tribal leader along with his two companions in Ghoriyan district of the province.

Afghanistan's security forces come under near-daily attacks by both Taliban and Daesh-affiliated fighters. Afghan forces have suffered staggering casualties in recent years, even as the Taliban hold peace talks with the U.S. Peace Envoy Zalmay Khalilzad. He is currently in the Afghan capital, Kabul, trying to restart stalled peace talks aimed at ending the country's 18-year war and America's longest-running military engagement.

The Taliban have held talks with prominent Afghans, including former president Hamid Karzai and members of opposition political parties, but so far they have refused to hold direct talks with the Afghan government, calling them U.S. puppets.

Late Wednesday, the Afghan government freed 490 Taliban prisoners from jails across the country in a goodwill gesture that was also an attempt to further the peace process.

The freed Taliban insurgents were either ailing or had less than a year remaining on their prison sentence, Feroz Bashari, government media center chief, told The Associated Press on Thursday. They were part of a group of 887 inmates that President Ashraf Ghani ordered freed to mark the Eid-al-Fitr holiday that followed the end of the holy month of Ramadan earlier in June, he said. It wasn't known when the remaining prisoners would be released.