California Highway Patrol says all northbound lanes of Interstate 680 at California Highway 237 west in Milpitas have reopened.
CHP tweeted at 9:37 p.m. that the situation at Montague was resolved and the lanes were open after being blocked for about five hours on Monday.
At around 4:45 p.m. CHP reported police activity at that location and issued a severe traffic alert.
KTVU learned a a suicidal subject was threatening to jump onto or from the roadway. That person came down on their own accord, according to officials.
At 9:41 p.m. Milpitas Police said Landess Avenue was about to reopen momentarily.