Several people were shot to death on Wednesday in the Houston suburb of Spring, Texas, the Harris County Sheriff's Office said, with local media reporting six people killed.
The Houston Chronicle, citing law enforcement officials, reported seven people were shot and that four children and two adults among them were fatally wounded in the incident in a residential area in Spring, about 25 miles (40 km) north of Houston.
Police appear to have cornered the suspected gunman a few miles from where the shootings took place, reports said.
Streaming video from the scene from broadcaster KTRK showed a small car sandwiched between two trucks on a cul-de-sac with about a dozen police vehicles nearby.
The Harris County Sheriff's Office said it would provide further details at a briefing later on Wednesday.