Turkish Interior Minister Selami Altinok said Ankara was taking extra security precautions after learning the lessons of Saturday's Ankara bombing, the worst of its kind in Turkish history, broadcaster CNN Turk reported on Monday.

The pro-Kurdish Peoples' Democratic Party has put the death toll of the twin suicide bombing outside the capital's main train station at 128. The prime minister's office has said 97 people were killed.

President Xi Jinping expressed condolences to Turkish President Recep Tayyip Erdogan on Monday over the massive blasts.