At least 11 people have died in western Guatemala after heavy rains caused a mudslide that swamped homes, spilled onto a highway and buried two buses early on Tuesday.

The buses were hit following the collapse of part of a hillside in the municipality of San Pedro Soloma, national disaster center Conred said in a statement.

Ten of the fatalities were in a bus that was buried, and another was inside one of the homes, Conred added. Nine people were injured, it said.

Emergency services were working with local officials to establish how many homes may have been buried and how many people are missing, the statement noted.