The pregnant daughter of a Honduran television commentator who has backed the coup-installed government was killed during an attack by gunmen.
Interim President Roberto Micheletti blamed members of the movement opposed to the June 28 coup that toppled President Manuel Zelaya.
The National Resistance Front Against the Coup denied involvement.
Two gunmen on a motorcycle shot at Karol Cabrera's car late on Tuesday in the capital of Tegucigalpa, a police spokesman said.
The daughter, 16-year-old Katherine Rodriguez, was driving the car. She was eight months pregnant, and doctors managed to save her baby boy.
It was unclear whether the attack was related to Ms Cabrera's work for state-run Channel 8 and a private television station. As a commentator, she largely supported Mr Michelleti's government, which took power after soldiers deposed Mr Zelaya.
The Resistance Front, which has staged hundreds of street protests demanding Mr Zelaya's restoration, denounced Mr Micheletti for making accusations without presenting proof.
"The Front does not have hit men, and demands that Micheletti stop making unfounded and irresponsible accusations that foment violence and hate," the group said in statement.
Several government officials or their relatives have been attacked in recent weeks, but no political motive has been confirmed.
On Sunday, gunmen killed a gay rights activist who had joined the Resistance Front. The movement claimed Walter Trochez was slain in retaliation for his anti-coup activities.