BOSTON — The Bruins' win streak reached seven on Tuesday night with a 5-3 victory over the Toronto Maple Leafs — the second over their rival in as many games — at TD Garden.

David Pastrnak scored his 400th career goal in the second period in the win.

The first period saw four goals — three from the Bruins — including two on the power play. The first came from Pavel Zacha when the puck pinballed off his skate and past Anthony Stolarz.

PAV WITH ANOTHER PPG pic.twitter.com/eo0FJkXLxq

Toronto got one back two minutes later with a shorthanded goal from Steven Lorentz to make it a 1-1 game after Charlie McAvoy got his pocket picked.

Hampus Lindholm made it 2-1 with a power play goal of his own before New Hampshire native Alex Steeves scored his first goal as a Bruin and against his former Maple Leafs team to give Boston a 3-1 edge after a strong offensive shift from the Bruins.

HAMMER TIME 🔨 pic.twitter.com/AfgGEzZfH7

STEEVES SNEAKS IT HOME 🚨 pic.twitter.com/x8VGli9psa

The three goals were enough for the Maple Leafs to pull Stolarz for Dennis Hildeby.

Pastrnak made it a three-goal game just 49 seconds into the second when he scored his 400th career goal. The game briefly paused as the entire team celebrated with Pastrnak behind Toronto’s net.

THEY POUR ONTO THE ICE FOR PASTA 🍝 pic.twitter.com/a8nPXRRGUv

The Maple Leafs cut the Bruins’ lead in half with 1:02 left in the middle period on the power play thanks to a Bobby McMann backhand goal.

Boston watched its lead dwindle to one when Oliver Ekman-Larsson beat Jeremy Swayman from the point to make it 4-3 just 2:01 into the third period.

Pastrnak made it 401 career goals with a power play tally to give the Bruins a 5-3 lead and some breathing room halfway through the third.

AND FOR THE 401ST TIME ‼️ pic.twitter.com/DBBffYOikl

The Maple Leafs pulled their goalie in the final minutes of the game, but they were unable to capitalize as Toronto dropped its third straight game while the Bruins earned their seventh consecutive win.