Mendocino County authorities are investigating an alleged armed robbery in Covelo. Sheriff’s deputies responded Monday afternoon to the 24000 block of Shady Lane to a report of a burglary-in-progress. The suspects fled, then returned when residents confronted and subdued them. Gary Casdell Fite of San Francisco and Marcel Jamarie Earl Patterson of Richmond were arrested and taken to a local hospital. Fite was then taken to jail and booked on a $500,000 bond. Patterson was later airlifted to an out-of-county hospital for further treatment.