HAMILTON, Ind. (WLS) -- Some buffalo are roaming northern Indiana, and the Hamilton Police Department is warning residents to be careful.[br /][br /]There are numerous wild buffalo loose in the area from Johnson Lake Rd to E. Bellefontaine Rd. and west of 100 east to 200 east, HPD says.[br /][Ads /][br /]"They are NOT FRIENDLY and should NOT be approached as they can become aggressive," police posted on Facebook.[br /][br /]Police cautioned residents to drive below the speed limit as the buffalo are not easily visible due to their dark coats.[br /][br /]"If you see them please contact the Hamilton Police Department and let us know of their location as they continue to roam," the department said.[br /][Ads /][br /]Police said overnight search efforts were expected to resume during daylight hours Monday.[br /][facebook URL="[br /]https://www.facebook.com/IndianaHPD/photos/a.1732351786793549/2220592244636165/" /]