Investigators are probing yet another suspicious fire after a home near the Castro district burned early Monday, police said.

The fire was reported just after 3 a.m. at 1370 Clayton St., located just up the hill from the Castro district, according to a fire dispatcher. The flames were under control about 45 minutes later.

At least six residents were evacuated from the house. The Red Cross is assisting those displaced by the fire. No injuries were reported.

The blaze marks the fifth suspicious fire in only a few days in the Castro area, with the previous four occurring early Thursday and Friday mornings.

It was not immediately clear whether Monday’s fire was connected to the others.

maldax@sfexaminer.com