Tags: Enrique Pena Nieto

Masked demonstrators threw Molotov cocktails and shot fireworks at police near Mexico City's airport on Thursday as thousands protested President Enrique Pena Nieto's handling of the apparent massacre of 43 trainee school teachers.

The elder statesman of Mexico's main leftist party said on Sunday the group was on the verge of falling apart after a series of mistakes and the disappearance of 43 students in a state it runs in the southwest of the country.

Pope Francis on Wednesday expressed his sorrow at what he said is clearly the murder of 43 missing Mexican students, though the government has yet to officially declare them dead after their abduction and apparent massacre in the southwest of the country in late September.