YouTube said it will beef up security at offices all over the world, one day after a shooter opened fire in the company’s headquarters in San Bruno, Calif.

“Our employees have been encouraged to take time off of work, or work from home and we are making sure wellness services are readily available,” the YouTube team said in a statement Wednesday evening. “We are also revisiting this incident in detail and will be increasing the security we have at all of our offices worldwide to make them more secure not only in the near term, but the long-term.”