MARIN COUNTY (CBS SF) — CHP in the North Bay are reporting that state Highway 1 near Muir Woods has reopened Tuesday after an accident blocked the highway in both directions for about an hour.

As of about 2:17 p.m., CHP reported that the accident on southbound and northbound CA-1 in the area of Muir Woods Road had left all lanes are blocked.

Exactly an hour later, authorities said that the accident had been cleared and all lanes were open.

There was no word from authorities about what had precipitated the accident, how many cars were involved or whether there were injuries.

CHP said motorists should expect residual delays.