Clashes erupted Sunday between forces loyal to Yemeni President Ali Abdullah Saleh and dissident troops in the capital Sana'a, DPA reported.
There were no immediate reports on possible casualties from the fighting, the latest in a series of clashes between the two sides.
Sunday's fighting flared up when the elite Republican Guard forces led by Saleh's son attacked checkpoints manned by troops of the dissident General Ali Mohsen al-Ahmar in Sana'a.
The scope of the fighting, in which heavy weapons were used, soon expanded and left several nearby houses damaged, according to witnesses.
Explosions were also heard in several areas of the capital, they said.
At least 1,480 people have been killed in Yemen since the clashes between security forces and anti-Saleh opponents began in February, according to the government.
On Sunday, the Yemeni army denied reports that 30 soldiers were killed when a government jet fighter mistakenly bombarded their camp in the southern part of the country.
"This is false and misleading news," the government's September 26 newspaper reported online, quoting a military source.
The Yemeni army is conducting a massive operation in Zinjibar, the capital city of the southern province of Abyan, against Muslim radicals with suspected links to al-Qaeda.