A CCTV image released by Abu Dhabi police

An Emirati woman has been arrested over the fatal stabbing of an American teacher and a foiled plot to bomb the home of another US citizen, UAE authorities said Thursday.
Interior Minister Saif Bin Zayed said the woman, believed to be the veiled suspect who killed the American woman Monday in a shopping centre toilet, had also attempted to plant a makeshift bomb in front of the home of an American doctor in Abu Dhabi.
"We are witnessing an unprecedented heinous crime in the UAE," the minister said.