(Adds second body discovered) MADRID, Feb 15 (Reuters) - Spain's Civil Guard said on Saturday it had found the Bodies of two African migrants in the sea off the country's Ceuta enclave, likely raising to 14 the number of people who drowned trying to swim to the territory from neighbouring Morocco last week. Spain said on Thursday its border police had fired rubber bullets in an attempt to push them back. The European Commission said on Friday it would ask Spain to explain why police fired rubber bullets, while the Spanish opposition has call for National Police director Arsenio Fernandez de Mesa to step down over the incident. The Bodies of eight men and one woman have already been recovered from Moroccan waters, and three by Spanish authorities.