PROVIDENCE, R.I. (AP) — Environmental officials say three mosquito samples in Rhode Island have tested positive for West Nile virus.

The Rhode Island Department of Environmental Management said Wednesday that the positive test results came from mosquito samples from traps set in Warren, Tiverton and Providence.

The department says the findings are expected because this is the highest risk period for transmission of mosquito-related illness to humans.

The mosquitoes were trapped Aug. 6 and Aug. 14 and tested at the state health laboratories. Other mosquito samples tested negative for West Nile and Eastern equine encephalitis.

In Rhode Island, five mosquito samples from four communities have tested positive for West Nile and four samples tested positive for Eastern equine encephalitis so far this year.

West Nile has been found in mosquitoes in Connecticut and Massachusetts.