An aggressive mountain lion was spotted early Tuesday in an unincorporated area of San Mateo County.
The animal was spotted in the 500 block of Pescadero Creek Road at about 4:30 a.m.
The mountain lion has killed many small livestock animals in a resident's backyard, according to county officials.
The animal approached the back door of the resident's home and was not intimidated by two pit bull dogs, county officials said.
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