Five passengers were crushed to death in Sri Lanka on Friday when a large tree fell on a state-run bus in the heart of the capital, Colombo, police said.

Another nine were rescued from the wreckage and admitted to the hospital, where their condition was listed as stable. There were about 20 passengers on board at the time.

“The bus had stopped at the Kollupitiya stand to pick up more passengers when the tree crashed on it,” a police official told AFP.

“It had rained overnight and the tree had become unstable.”

He said an investigation was launched to determine whether the municipal government had failed to properly maintain trees lining streets in the upmarket neighbourhood.