Israeli troops opened fire after they spotted the workers, after which the three were detained and taken to an unknown location.
An Israeli military spokesman said "three suspects were identified approaching the security fence." As they approached the fence, Israeli forces detained them and took them for security questioning in Israel, he said.
The spokesman confirmed the fire of warning shots in the air.
Two weeks prior, a number of Gazan workers were detained also attempting cross through the border fence near Beit Lahiya, northern Gaza.
