Mexico missing students: President Pena Nieto breaks silence

Mexican President Enrique Pena Nieto has vowed to identify and punish those responsible for the recent disappearance of 43 students after clashes with police.

In a televised address, he described the incident in the city of Iguala as "shocking, painful and unacceptable".

The students went missing after a protest over job discrimination.

Will Grant reports.