NAIROBI, Kenya — The escalating conflict in the Democratic Republic of Congo threatened to embroil Rwanda after a woman there was killed and her baby wounded in shelling on Thursday, Rwanda’s government said.

Congolese forces with the support of a new United Nations intervention brigade are fighting rebels in the eastern part of the country near the city of Goma. The Rwandan government said Thursday that the Congolese military had deliberately shelled Rwandan territory and intended to strike Rwandan civilians.

“The persistent shelling of Rwandan territory is unacceptable, as it would be to any sovereign nation,” said Louise Mushikiwabo, Rwanda’s foreign minister, in a statement. “We have remained restrained for as long as we can, but this provocation can no longer be tolerated.”

There has been a significant diplomatic effort to prevent the situation from escalating further, with the head of the United Nations mission, Martin Kobler, traveled to Kigali, Rwanda’s capital, on Thursday to meet with officials there. The United Nations has previously accused Rwanda of backing the Congolese rebels of the M23 movement.