By David ShepardsonWASHINGTON, Jan 29 (Reuters) - The National Highway Traffic Safety Administration said Thursday it is opening an investigation after a Waymo self-driving vehicle struck a child near an elementary school in Santa Monica, ​California last week, causing minor injuries. Advertisement AdvertisementAdvertisement Advertisement"The vehicle remained stopped, moved to the side of the road, and stayed there until law enforcement cleared the vehicle to leave the scene," Waymo said. ‍NHTSA opened a probe in ⁠October into Waymo vehicles near school buses. The Austin Independent School District said in November five incidents occurred in November after Waymo software updates to resolve the issue. In December, the school district told Reuters that Waymo had refused to halt operations around ‌schools.