It quoted Rachel Zeng of the Singapore Anti-Death Penalty Campaign as saying he was executed about 3.30pm at the Changi Prison after meeting his family for the last time.
Usually, such executions take place at dawn on Fridays.
His execution came after a five-panel Court of Appeal dismissed an eleventh-hour attempt to stay the execution.
Jabing, 31, was originally scheduled to be hanged in the morning for killing a construction worker in 2008 during a robbery.