国际英语新闻:Car Bomb Kills 28 in Turkey; Erdogan Vows Revenge

Turkish President Recep Tayyip Erdogan is vowing to avenge Wednesday's car bomb attack in central Ankara that killed at least 28 and wounded 61.

He said that the bombing exceeded all "moral and humane boundaries" and that Turkey would retaliate against not only the attackers but also those he called the "forces" behind them.

Erdogan put off a planned visit to Azerbaijan, and Prime Minister Ahmet Davutoglu canceled his trip to Brussels, where he was to have talked about the refugee crisis with other European leaders.

The car bomb exploded as a convoy of military buses stopped for a traffic light at an intersection in the Turkish capital, just a few hundred meters from parliament and military headquarters.

Witnesses said the blast could be heard across the city. Ambulances and police rushed to seal off the grisly scene, treat the wounded and put out the fires.

The government imposed a media blackout on images of the explosion.

NATO Secretary-General Jens Stoltenberg condemned Wednesday's bombing, saying there could be no justification for such horrific acts.

John Bass, the U.S. ambassador to Turkey, said he was deeply saddened and shocked and sent his prayers out to the victims.

No one claimed responsibility for the bombing, and police did not reveal any clues about who was behind the attack.

The Islamic State group was blamed for last October's suicide bombing at a peace rally in Ankara that killed more than 100 people — the bloodiest single terrorist attack in Turkey since it became a modern state in 1923.

Turkey has also been battling the outlawed Kurdistan Workers' Party, which has been fighting a 30-year guerrilla war for more Kurdish autonomy. The Turkish military has been a frequent target of the militants.