Detainees at Otay Mesa Detention Center were offered masks, but only if they signed contracts. When the women demanded to be given masks, they were threatened with pepper spray, according to the multiple accounts.

https://www.sandiegouniontribune.com/news/immigration/story/2020-04-10/otay-mesa-detention-center-gets-masks-but-asks-detainees-to-sign-contract-first