PITTSBURGH — Erik Christensen and Alex Frolov scored 15 seconds apart to spark a four-goal third period, and the New York Rangers rallied for a 4-1 victory over the Pittsburgh Penguins on Wednesday night.

Sidney Crosby extended his point streak to a career-high 20 games when he assisted on Evgeni Malkin’s first-period goal for Pittsburgh, but the Penguins lost for the second straight night after winning 12 in a row.

Christensen tied it with 9:50 to play, while New York was on the power play, and Frolov gave the Rangers a 2-1 lead by burying his own rebound at 10:25.

Artem Anisimov and Brian Boyle scored 34 seconds apart less than five minutes later to ice the Rangers’ first win in regulation in Pittsburgh in nearly five years.