Authorities have said there are no missing children at a collapsed Mexico City school where rescuers have been hunting for a girl they believed was trapped.

A moderate earthquake has struck southern Mexico, shaking buildings in the capital and sending frightened people out into the streets.

MEXICO City prosecutors have arrested a man who allegedly kept his two teenage stepdaughters captive for five years, fathered five children with one of them, then killed the other woman and one of the babies.