MADRID – Emergency services in Spain said 45 people were treated, four of them for serious injuries, after a double-decker commuter train crashed into a barrier in a town near Madrid on Friday.

Most were treated for bruises and for anxiety from the afternoon crash, the Madrid region’s Summa 112 emergency service said in a statement.

Spain’s railway operator, Renfe, said the accident happened at 3:37 p.m. at the end of a track at Alcala de Henares station, 24 miles east of the Spanish capital.

Renfe said in a statement it was investigating the cause of the crash.

It says commuter train service wasn’t suspended, but that some trains were running behind scheduled.

A similar accident involving a commuter train that crashed into a buffer in Barcelona sent than 50 people to the hospital in July at the height of the tourism season.

Last month, 27 people were injured when a passenger car derailed when a track flooded between the southern Spanish cities of Malaga and Seville.