7.4 quake in Mexico kills six

A 7.4 magnitude earthquake struck southern Mexico on Tuesday, killing six people, sending hundreds fleeing from their homes and forcing the closure of a major state-owned oil refinery.  Hundreds of aftershocks were reported in the hours following the initial tremor, which was felt in Mexico City, some 700 kilometers distant from the epicenter in Crucecita, in Oaxaca state. The 7.4 quake struck at a depth of 23 kilometers, the US Geological Survey reported.  An initial tsunami warning was later reversed. There was no damage reported to "strategic infrastructure" including ports, airports, refineries and hydroelectric plants, said President Andres Manuel Lopez Obrador.  The quake has hit at a time when Mexico is already reeling from the coronavirus pandemic. It has suffered more than 23,000 COVID-19 death and 191,410 cases.