Officials in Oklahoma say residents should be vigilant about checking for ticks after the death of a man who acquired the Heartland virus.

Oklahoma's health department has released few details about the death, noting only that the man was over 65 and was from Delaware County in northeast Oklahoma.

The man died from complications of the virus, which is found in the Lone Star tick and spread through tick bites.

State health officials said Wednesday that residents should use insect repellent, wear long-sleeved clothing and make thorough tick checks after being outside.

The man is among 10 people known to acquire the virus. The Centers for Disease Control and Prevention says another person died after being diagnosed but had other health conditions.

Virus symptoms include fever, fatigue, and diarrhea.