(CNN) -- At least nine people have been killed and 14 others wounded in heavy shelling in Somalia's capital city, Mogadishu, according to a human rights group.

The clashes began late Sunday and continued into Monday morning, said the Elman Peace and Human Rights Organization, a group based in the city.

"These fatalities are from the overnight shelling and we are still monitoring and counting Monday's casualties," said Ali Yasin Gedi, the organization's vice chairman. "The shelling was terrible."

Meanwhile, residents of Mogadishu are fleeing parts of the city as government forces come in because of reports that Somalia's government plans to launch a war with Islamist rebels currently in control of the capital.

"We are on the move again, leaving our houses, because I don't want myself and my children (to) die," said Fowsiya Ahmed, who lives in the Gubta neighborhood in southwest Mogadishu.

The government forces have recently been trained in the neighboring countries of Djibouti, Kenya, Ethiopia and Uganda. They are believed to number in the thousands.

--Journalist Mohamed Amiin Adow contributed to this report.