UPDATE 2: Harbaugh returned to the sideline during the first quarter.

UPDATE: Jim Harbaugh is dealing with an illness and is questionable to return, according to the Los Angeles Chargers. Defensive coordinator Jesse Minter will serve as interim head coach in the meantime.

The Los Angeles Chargers are on the road against the Denver Broncos in Week 6 and something strange has happened. Chargers head coach Jim Harbaugh went to the blue medical tent early in the first quarter and then headed to the locker room with the team’s training staff.

Harbaugh’s brother, John, briefly interrupted his Ravens postgame press conference when he received the news that Jim was leaving the field so he could call to check on his brother.

We will continue to update this story as more details become available.