Police say two people are in serious condition in the hospital and 11 others are receiving treatment after a race car lost control during a rally in northwestern Spain and crashed into onlookers.

Six people were killed in Saturday's accident. A police spokeswoman said four of the dead were female, including a pregnant woman and a 13-year-old.

A woman and a young girl were badly injured and are in an A Coruna hospital.

Prime Minister Mariano Rajoy tweeted his condolences and said the Coruna Rally had been left in mourning. He wished those injured "a speedy and complete recovery."

Police were investigating the causes of the accident Sunday, the spokeswoman said. She spoke on condition of anonymity, following police rules.