West Nile mosquito spraying will resume at Fort Sam Houston Tuesday night.

Several mosquito sample pools have already tested positive for the West Nile Virus on post and target-based fogging with handheld devices began late last month.

So Tuesday night crews on Fort Sam Houston will begin truck-mounted fogging.

That's set to start at 8:30 p.m.

They will spray again at the same time Wednesday night and again Thursday night in low-lying areas where mosquitos may thrive.

Crews are also fogging at Lackland, where two areas tested positive last week for West Nile Virus and on Randolph, where one area tested positive.