Google’s self-driving cars were involved in two accidents on the roads of Mountain View, California, in June, but humans driving the other vehicles were at fault in both cases.

No injuries were reported in either incident, Google said in its monthly report that lists accidents involving its fleet of autonomous cars. Both collisions involved Google’s Lexus sport utility vehicles that are equipped with autonomous driving technology. Last month, Google also began testing on the streets of Mountain View another one of the self-driving prototype cars it has built.

In one accident, a car traveling around 5 mph hit the rear bumper of a Google Lexus that had stopped at a red light. Both cars ended up with small scrapes on their bumpers.

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