ANKARA

 At least 30 of the 61 people wounded in Wednesday’s deadly bomb attack in the Turkish capital Ankara have been discharged from hospital.

At least 28 people were killed in an explosion targeting military-owned vehicles on Wednesday evening.

The Turkish General Staff issued a statement early on Thursday saying that the remaining 31 were still hospitalized, but none were in critical condition.

Air Force Brigadier General Reha Ufuk Er and his wife, who were near the scene of attack and were slightly wounded, were in good condition, it added.

Nobody has claimed responsibility for the deadly attack.

Deputy Prime Minister Numan Kurtulmus told reporters on Wednesday that a delegation of seven investigators headed by the Ankara Chief Prosecutor was working on the case. He vowed that the identities of those behind the attack would be revealed at the earliest.

An initial report from Ankara’s governor suggested three military-owned vehicles and a private vehicle were hit during the evening rush hour.

Anadolu Agency reporters at the scene said the blast occurred in Merasim Street which connects Dikmen Street to Inonu Boulevard and is close to Turkish General Staff and parliament buildings.

Ankara Governor Mehmet Kiliclar said the authorities believed a bomb-laden vehicle was the source of the blast.

The Turkish General Staff said that a "terror attack" hit vehicles carrying its personnel at 6.31 p.m. local time [1631 GMT] while they were waiting at traffic lights on Inonu Boulevard.

Following the attack, Prime Minister Ahmet Davutoglu cancelled a planned visit to Brussels while President Recep Tayyip Erdogan cancelled a trip to Azerbaijan scheduled for Thursday.

The attack was also condemned by the global community, which offered solidarity to Turkey.