Earlier police have confirmed 12 people had been killed and dozens sustained injuries in the blast.
วงจรปิดจับภาพวินาทีแสงเพลิงจากเหตุระเบิด แยกราชประสงค์ ประชาชนแตกฮือวิ่งหนีอลม่านPosted by กลุ่มคนอาสา กู้ชีพ กู้ภัย Thailand on Monday, 17 August 2015
According to bangkokbiznews.com, several cars were set ablaze by the blast, which took place near the Erawan Shrine in the city center, a popular tourist attraction.
The explosion was caused by a bomb. Police consider the explosion a terrorist attack.
Body parts were scattered across the street after the bomb went off, local residents report.
Police said a bomb squad was attempting to deactivate two unexploded bombs that had been found at the site.
Thailand's Defense Minister Prawit Wongsuwong said that the terrorist attack had been aimed at foreigners to damage the country's tourism.
All 438 schools under the Bangkok Metropolitan Administration will be closed on Tuesday due to security concerns, government said.