Some NBA fans were a little surprised to see COVID-19 sniffing detection dogs used last night to help screen spectators to the Miami Heat’s game against the LA Clippers Thursday night.

Officials say if the dog keeps walking after sniffing a fan, the person is cleared to enter the arena.

But if the dog sits next to the person, there is a chance COVID-19 is detected, and the fan will not be allowed to attend.

If a fan in line is allergic to dogs or afraid of them, they can opt for a rapid COVID-19 test instead.

Some say the dogs have the ability to detect the virus, but others say more research needs to be done.