Aram Boghosian for The Boston Globe

Police have increased their presence in the North End because of noise complaints from residents.

Aram Boghosian for The Boston Globe

Two police officers travel through the North End in their marked cruiser.

Brian Feulner for The Boston Globe

Sergeant Thomas Lema showed some of the trouble spots throughout the North End where residents have complained about noise.

Brian Feulner for The Boston Globe

Weekend nights and early mornings bring a steady stream of people to the North End.

Brian Feulner for The Boston Globe

Sergeant Lema told noisy walkers to quiet down as they entered the North End early Sunday morning.

Aram Boghosian for The Boston Globe

Alex Blaze, 18, Julianne Jeha, 18, and AJ Furtado, 19, yelled while standing on Hanover Street after 1 a.m.

Aram Boghosian for The Boston Globe

Karen Tamms and Jeremy Berkowitz of Boston walked down Hanover Street around 1:45 a.m. looking for a cab.

Aram Boghosian for The Boston Globe

Michelle Fleming, 21, of Boston spoke with Sergeant James Earle as he stood outside Bova's Bakery at 2 a.m.

Brian Feulner for The Boston Globe

Sergeant Lema got the attention of partygoers at a noisy apartment to tell them to quiet down.

Aram Boghosian for The Boston Globe

A couple walked together along Margaret Street at 2:30 a.m. in the North End.