By The Nation
After being alerted of the incident at 10.30pm, police arrested the "drunk" tenant of the room on the seventh floor of building six at Phatthara Condo complex on soi Ekkachai 83/1.
Police have yet to identify the dead woman or the man in custody.
Local resident Chumphon Boonthong, 52, said he went to investigate after hearing a loud sound and discovered the woman's body on the ground, then called the police.
The dead woman was found with a knife in her left hand.
Pol Lt Col Narongrit Thongpae, deputy commander of the Bang Khun Thian police station, said the woman had apparently met the man at the room and the two had been arguing before she fell to her death.
Narongrit said details of the incident were still not clear as the man was too intoxicated to testify.