Groups of protestors partially blocked traffic in four places across Boston Wednesday morning to sound the alarm about the pending climate crisis.

Early in the morning, a small group of protesters sat down in the road on the Summer Street bridge that crosses the Fort Point channel, blocking one lane of traffic. They chanted "We say frack no," a slogan opposing natural gas drilling. Other protestors waved flags while standing on the sidewalk.

By about 8:30 a.m., those protestors joined a few dozen other to shut down traffic in both directions on the Evelyn Moakley Bridge, which also crosses the Fort Point channel, for about half an hour. While there was a large police presence, there appeared to be no conflict between police and protestors. A little after 9 a.m., the group voluntarily relinquished the bridge and with a police escort marched into downtown.

The protesters repeatedly said they were apologetic for disturbing people's commutes, but they said their actions were a minor inconvenience compared to the disruptions that climate change will bring. The protesters want state officials to cancel new fossil fuel projects like Project 2015A, the Peabody gas- and oil-powered plant, and a gas pipeline in Springfield.

“It’s a climate emergency, and people are just sleep-walking into disaster,” said Susan LeMont, a spokesperson for Extinction Rebellion. “We’re trying to wake them up. We apologize for the inconvenience, but it’s important that we address this problem.”

Other protesters blocked roadways at Seaport Boulevard and Atlantic Avenue, Kneeland Street and Atlantic Avenue, and in Leverett Circle downtown. Massachusetts State Police said they arrested five demonstrators in Leverett Circle.