Two pedestrians died when they were hit by a pickup truck in Plutaluang.
Jitapa Korkerdboon, 55, died at the scene of the June 12 accident on Sukhumvit Road at the Monument Junction. Supatcharika Chaipala, 42, suffered critical injuries and died later at Queen Sirikit Naval Medical Center.
Boonpeng Sangkapan, 45, the driver of the Isuzu truck that hit the women, suffered a broken bone.
Police said Boonpeng was driving from the Sattahip Pier and lost control entering Sukhumvit, running up on the sidewalk and hitting the two women walking to Monument Park to exercise.
He was held pending further investigation into the cause of the deadly accident.