Need some quick advice about getting tenants out.

[Quintin Mortensen]

I have some tenants that gave my their 30 day notice last month and said they would be out this Tuesday the 30th. I just got a message from them saying they haven't found a place yet and want until the end of the week to move out. I already have a lease with new tenants to get in on July 1st so what should I do? How can I get them out?