The Boston Police bomb squad was called to a Marine Road home in South Boston Saturday morning after a ­couple awoke to find that someone had smashed their basement window and thrown what appeared to be a Molotov cocktail into their family room.

“We didn’t notice anything was awry until this morning,’’ said Richeé Byrd, who shares the home with her fiancee, Nicole Fembleaux. “We started cleaning it up; that’s when we saw the plastic bottle. It was plastic, not glass, with the cloth in it. It was burnt.’’

The fuse went out, she said, and the only damage was to the window.

After they called police, Byrd said, the bomb squad, fire department, detectives, and uniformed officers ­arrived. Arson investigators were also on scene, Boston police spokeswoman Officer Rachel McGuire said.

The device might have been thrown in the window between 1 and 2 a.m., McGuire said. She said no ­arrests had been made and the case remained under ­investigation.

Byrd said she was ­impressed by how fast and thorough the response was.

“They brought the civil rights detectives out here just to make sure because, you know, we’re gay, obviously I’m black,’’ she said. “I appreciate them not overlooking that ­aspect.’’

Byrd said she had had nothing but good experiences in her neighborhood, where she has lived since June, and she was hoping it was just a random incident.

“I don’t feel threatened, I don’t feel intimidated. I don’t feel any malice from anyone,’’ she said. Her neighbors came to check on her after she called police, she said. “I feel protected. I feel like my neighbors will have my back.’’

Mary Carroll, who lives across the street, said her grandson heard glass breaking overnight and saw a car speeding off.

On Saturday afternoon, Byrd’s best friend was helping her fix the window. Byrd’s ­fiancée had left with family members to go wedding dress shopping — the couple plans to get married in October.

Byrd said they intended to go to the St. Patrick’s Day ­parade Sunday.

In short, Byrd said, they were putting the incident ­behind them.

Evan Allen can be reached at evan.allen@globe.com. Follow her on Twitter @evanmallen.