Mexico City rocked by massive 7.4 magnitude earthquake

A powerful 7.4 magnitude earthquake has struck Mexico City. Mexico's seismological agency said its center was east of the city in the state of Puebla. As many as 42 people have been killed, according to media reports. Several buildings in Mexico City were severely damaged. Earlier this month, a powerful 8.1 magnitude quake killed at least 90 people in the country.