At least three cases of dengue fever have been reported in residents bitten by local mosquitoes in the Baldwin Park neighborhood east of downtown Los Angeles.

Los Angeles health officials announced they are investigating a handful of locally acquired dengue fever cases in the city of Baldwin Park.

While Los Angeles County is reporting three locally acquired cases of dengue this year -- which is rare for the region -- there have been at least 3,085 cases nationally of locally acquired virus so far this year,

LA County health officials warned about an "unprecedented" cluster of dengue cases after two more people in Baldwin Park tested positive.