SAN FRANCISCO, Dec 1 (Reuters) - Two of Uber Technologies Inc’s most senior remaining security executives resigned on Friday and another took medical leave after the company’s new chief executive officer criticized past practices, a source familiar with the situation said.

The departures come amid a high-stakes legal battle with rival self-driving car company Waymo, an Alphabet Inc subsidiary. (Reporting by Joseph Menn; Editing by Lisa Von Ahn)