Eighteen Yemeni rebels have been killed in fighting around the Saudi border over the past 24 hours, Yemeni army officers said on Tuesday.
Clashes flared this week around the Red Sea port of Midi and the nearby Saudi border town of Huthaira, spilling over into the rebel heartland of Saada inland.
The Yemeni army officers said loyalist forces had managed to wrest control of several rebel-held towns straddling the border.
Saudi officials contacted by AFP did not respond to requests for comment.
The rebels control most of northern Yemen, including the Red Sea coast.