HOUSTON -- An amber alert was in effect Saturday for two girls allegedly kidnapped in Houston, KTRK-TV reported.

Jayla Gasaway, 4, and Cadence Mills, 2, were kidnapped about 2:30am local time Saturday in southeastern Houston, police said, adding that the girls were taken by their mother's ex-boyfriend Courtney Dickerson, 22.

Dickerson was last seen driving a gold 2003 Chevrolet Tracker with Texas license plates.
Police said Dickerson was a registered sex offender.