Gov. Steve Sisolak announced Tuesday he’s extending the closure of schools until the end of the school year and is not close to relaxing restrictions aimed to stop the spread of the coronavirus. The governor and state experts said Tuesday that Nevada would take a gradual approach to easing business closures and stay-at-home rules, without giving any expected date for how soon that might occur. Sisolak also said it was too soon to say whether schools would remain closed for the start of the new school year in the fall.