Sudan Wednesday accused Chad of violating its territory three times since Tuesday in the latest exchange of accusations between the neighboring countries.
A Sudanese foreign affairs spokesman, Ali Al Sadiq, told official Sudanese media that Chadian forces fired a missile at a Sudanese military post in West Darfur Wednesday.
The spokesman said a Chadian helicopter Wednesday also bombed a village northeast of Baida, and he said a Chadian warplane flew over Sudan's airspace on Tuesday.
Chad did not immediately respond to the reports.
Also on Tuesday, Chad accused Sudan of ordering rebels opposed to Chad's President Idriss Deby to attack Chadian soldiers.
The exchange of accusations comes one month after the two countries signed a peace accord pledging not to support rebel movements on each other's territory.
Sudan accuses Chad's government of supporting rebel groups in war-torn Darfur, while Chad says Sudan helped the rebels launch an assault on the capital, N'djamena, in February.
Chad and Sudan have signed six peace accords in recent years, but relations remain generally hostile.
Some information for this report was provided by AFP and Reuters.