An explosion outside Turkey’s interior ministry in the capital Ankara was a “terrorist attack”, the interior minister has said.
Two attackers arrived in a car at around 09:30 (06:30 GMT) and carried out the attack injuring two officers, Ali Yerlikaya said.
Mr Yerlikaya said an attacker blew himself up in front of a ministry building and another was “neutralised”.
The explosion happened just hours before parliament was due to reconvene.
No-one has claimed the attack, and it is not clear who is responsible.
The incident began when one of the attackers exited the car and threw a small explosive at the ministry building to distract security.
The second attacker then opened fire at guards by the ministry gate, before setting off a bomb – resulting in the attacker’s death.
The first suspect, meanwhile, ran into the compound and was immediately shot dead by the police in the building.
Two officers were injured. One was shot in the chest and another has suffered injuries in both legs and an eye.
Mr Yerlikaya told reporters that none of the injuries were life-threatening.
“Our struggle will continue until the last terrorist is neutralised,” the minister wrote on social media.
A senior Turkish official told Reuters news agency the attackers had hijacked the vehicle and killed its driver in Kayseri, a city 260km (161 miles) south-east of Ankara.
In his speech opening parliament, President Recep Tayyip Erdogan described the attack as “the final flutters of terrorism”.
“The vile people who took aim at the peace and security of our citizens did not reach their goal and they never will.”
The incident comes as Turkish parliament is expected to ratify Sweden’s entry into the Nato alliance.
Turkey dropped its opposition to Sweden’s application in July, having opposed it for months, arguing it was harbouring Kurdish militants.
Militants mainly from PKK, or Kurdistan Workers’ Party, used to carry out frequent attacks across Turkey.
The group has come under intense pressure by the authorities, who have jailed its leaders and conducted military operations against Kurdish bases inside Turkey and across the border in Syria and Iraq.
The bomb on Ataturk Boulevard was the first in Ankara since 2016, when a spate of deadly attacks gripped the country.
The last attack in the capital was in March 2016, when a car bomb exploded just 500m (550 yards) from the site of Sunday’s attack. That bombing was claimed by TAK, a group with close links to the PKK.
It was the fifth attack in the country’s capital in a year.
The last major attack in Turkey was in November last year, where a bomb left on a busy street in Istanbul exploded and killed six people.
Turkish authorities blamed Kurdish militant groups in Syria for the attack – though none have claimed responsibility.
BBC/Samson Akintokun
