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MEXICO CITY (AP) — Authorities in Mexico have raised the alert level for the Popocatepetl volcano southeast of Mexico City due to increasing activity. It's now at the fifth step on a seven-level warning scale.

A lava dome is growing in the volcano's crater, the National Disaster Prevention Center said Tuesday. The 17,886-foot (5,450-meter) volcano also has been spewing fragments of incandescent rock recently, as well as water vapor and ash...