Stanford University is eliminating sales of cigarettes, chewing tobacco and e-cigarettes starting next month.

The San Jose Mercury News reports vendors who operate convenience stores at the Valero gas station and Tresidder Union have agreed to the university's request to phase out all tobacco sales.

The newspaper says the move builds on Stanford's "smoke-free environment policy," which prohibits smoking in classrooms, offices, enclosed buildings and facilities.

Smoking is permitted outdoors, except during organized or athletic events, and is limited to areas more than 30 feet from buildings.