Four people were killed and 20 others injured when a bus collided with five cars and plunged off a bridge onto railway tracks on Friday.
The coalition said it had carried out what it called "legitimate military action" in the area targeting Houthi rebels.
The accident was one of the deadliest in Uganda in recent years and happened on Friday night in Kiryandongo, about 220 kilometres north of the capital Kampala.
Nineteen people were killed and 21 others injured when a bus veered off the road and plunged down a ravine in the central Philippines, police said Wednesday.
Nineteen people including 12 military personnel were injured on Wednesday in an explosion on a bus in Sri Lanka, said the military, adding they do not know the cause but suspect it may be a bomb or grenade.
A bus carrying tourists from US cruise ships to an archeological site in Mexico crashed Tuesday after running off the road, killing at least 12 people including several foreigners, state authorities said.
British police on Thursday said they had arrested a 50-year-old jogger on suspicion of knocking a woman into the path of a bus on a busy west London street earlier this year.