An explosion outside a church on Borneo island wounded several children on Sunday, Indonesian police said, AP reported. Several vehicles were also damaged in the explosion in the parking lot of the Oikumene Church in Samarinda, the provincial capital of East Kalimantan province, said national police spokesman Brig. Gen. Agus Riyanto. He did not give more details and said the incident was being investigated. Media reports cited local police spokesman Lt. Col. Fajar Setiawan as saying the explosion came from a Molotov cocktail thrown by a man riding on a motorbike. Setiawan said the man was arrested, while four children were slightly wounded and were being treated at a hospital.