CAIRO (AP) — An Egyptian woman who worked for the United Nations as a freelance consultant was fatally shot in the head while driving through an upscale Cairo neighborhood on Sunday, security officials said.

It was not immediately clear whether the woman, identified as 41 year-old Nermeen Gomaa Khalil, was targeted or killed in a random crime. Police said she was shot by unidentified gunmen passing in another car, but no one has been arrested.

It was one of the more serious attacks in a crime spree over the past year after the ouster of Hosni Mubarak and the withdrawal of police from the streets, which led to a deterioration in security.

Khalil was shot in broad daylight while driving her SUV on one of Cairo’s busiest streets in the neighborhood of Mohandiseen, according to a security official who spoke on condition of anonymity because he was not authorized to speak to reporters. Khawla Mattar, director of the UN Information Center in Egypt, said Khalil was a consultant with a women’s fund at the United Nations in Cairo and also worked at a medical lab.

The crime wave has focused mainly on personal robberies, and more recently a string of bank robberies or attempts, while murders have been rare.