Three people were killed and at least 15 others injured in a bomb attack in the Turkish capital of Ankara Tuesday. Turkish officials blamed “terrorists” for the attack; Kurdish rebels affiliated with the banned Kurdistan Workers Party (PKK) are the most likely culprits. The Turkish military has stepped up aerial attacks against the PKK in Northern Iraq in recent months. Prime Minister Recep Tayyip Erdogan said Monday the government is prepared to send in ground troops to clear out PKK bases in the region.