The Committee to Protect Journalists says two Colombian journalists left the country last week after receiving death threats linked to their reporting.

In a statement Wednesday, the media watchdog group said television producer Hollman Morris brought his family to the United States after he received email threats in response to a report on Colombia's civil conflict. The threats called him an "anti-patriot, a member of the guerrillas, and a tattletale."

The statement said radio host Geovanny Alvarez Castro received several anonymous death threats after a month-long series on government corruption. It said police also warned him of a possible attempt on his life. Alvarez has kept his location secret.

The media group called on Colombian authorities to investigate the death threats against both journalists.

Colombia is grappling with a four-decade-long civil war involving leftist rebels, government forces and rightist paramilitary groups.

Some information for this report was provided by AP.