Afghan officials say they are working for the release of kidnapped Italian aid worker Clementina Cantoni, who was dragged out of her car Monday by gunmen in the Afghan capital, Kabul.

President Hamid Karzai told reporters Saturday that the government knows who kidnapped the CARE International worker and wants her released safely.

His comments followed news reports that one suspected kidnapper, who identified himself as Temur Shah, claimed to have killed her. The man later reversed himself and said she is still alive.

Aid agencies have pasted hundreds of posters around Kabul appealing for the release of Ms. Cantoni. The posters say, "Please help Clementina" and praise her for aiding thousands of Afghan widows and war orphans.

Some information for this report provided by AP and AFP.