At least 15 people including two children were killed after a cargo boat collided with a ferry on the Nile on Wednesday, hospital, security and political sources said.

Egyptian police have arrested the captain of the cargo boat after the crash north of the capital Cairo, police sources said.

Six passengers out of the 25 on board the ferry have been saved while the search is still ongoing for another four missing people, the interior ministry said in a statement on its Facebook page.

There were many children on the boat, the security and hospital sources added, without giving the ages of the two children who died.

Police said they have have arrested the captain of the cargo boat and his deputy after the accident, one of many that happen on the Nile and off Egypt’s coast each year.

In the worst such accident in February 2006, an Egyptian ferry sank in the Red Sea, killing more than 1,000 people.