6 people wounded, 2 assailants shot dead outside Istanbul court

Two people were shot dead while trying to attack a courthouse in Istanbul on Tuesday, Turkey's interior minister said.

The man and woman were killed during an "attempt to attack" a security checkpoint at the Caglayan courthouse at 11:46 a.m. local time (0846 GMT), Interior Minister Ali Yerlikaya posted on social media.

Six people were injured in the incident, including three police officers. "I congratulate our heroic police officers. I wish a speedy recovery to our injured," the minister added.

Caglayan, which is also known as the Istanbul Justice Palace, is a huge court complex in the Kagithane district on the city's European side. Heavily guarded and with multiple entrances, it was Europe's largest courthouse at the time of its opening in 2011.

Camera footage published by Turkey's state-run Anadolu news agency showed the assailants being gunned down on the building's forecourt. They appeared to shoot back at police before they were killed.

Other images showed people sheltering by the gates of a metal detector inside the courthouse or running for cover. Police officers helped a man who appeared to have been wounded in the leg.

Yerlikaya later identified the attackers as alleged members of the Revolutionary People's Liberation Party-Front, or DHKP-C, a far-left group that is considered a terrorist organization in Turkey, the United States and the European Union.

The Istanbul Chief Public Prosecutor's Office has opened an investigation, Turkish Justice Minister Yilmaz Tunc said.

The attack took place on the day when Turkey was commemorating the anniversary of an earthquake in the country's south that killed more than 53,000 people.

The DHKP/C has been largely inactive in recent years. In March 2015, the group took a prosecutor hostage at the same courthouse, demanding details about the police killing of a teenager during anti-government protests the previous year.

Two gunmen died as police stormed the building, and the prosecutor later died of his injuries.

The group also claimed responsibility for a February 2013 suicide bomb attack on the U.S. Embassy in Ankara in which a Turkish security guard was killed and four other people wounded.

Last month, a man was shot and killed at an Istanbul church in an attack that was claimed by the Islamic State group.

Two men were later arrested on suspicion of killing Tuncer Cihan, 52, on Jan. 28 at the Santa Maria Church in the Buyukdere neighborhood. Dozens of suspected IS members and supporters also were detained.