By Temilade Adelaja and Seun Sanni OWO, Nigeria (Reuters) -Survivors of an attack by unknown assailants on a Catholic church in Nigeria lay weeping and writhing in pain at a local hospital on Monday after suffering what a doctor described as lacerations, bullet wounds and blast injuries. At least 50 people including children were killed, according to media reports, during the attack on St Francis Catholic Church in the town of Owo, which took place during Sunday mass as worshippers were celebrating the Christian holiday of Pentecost. Police have yet to release a death toll. Inside the church, …