A man was struck and killed by a Caltrain in Redwood City on Friday evening, the second fatality on Caltrain tracks Friday, a spokeswoman said.

At about 5:45 p.m. a northbound Caltrain struck and killed the man on the tracks between Maple and Walnut streets, Caltrain spokeswoman Christine Dunn said.

The fatality came about two hours after Altamont Commuter Express train No. 4 struck and killed a woman on the tracks between Julian Street and De La Cruz Boulevard in San Jose. That fatality happened at about 3:40 p.m. and caused delays of up to 90 minutes.