HOUSTON -- Tornadoes hit the U.S. states of Oklahoma and Arkansas on Thursday, injuring at least nine people, U.S. media reported.

All those injured were in Arkansas and two of the injuries were attributed to a lightning strike, according to the report, according to the website of newspaper Dallas Morning News. Some trees, homes and power lines were also damaged in Arkansas.

At least one tornado reportedly touched down Thursday night in the Tulsa suburb of Broken Arrow, in Oklahoma.

Though the extent of the tornado's damage was difficult to determine as it was dark out, experts said the tornado did not appear to be a top-of-the-scale twister like the deadly one that hit Moore, in the southern part of the Oklahoma City metropolitan area, last week, according to the report.

The tornado came after at least two other tornadoes touched down in Oklahoma and two more hit Arkansas on Thursday.

A tornado, classified as an EF-5, the strongest storm on Earth with 200 mph-plus winds, hit Moore on May 20, killing 24 people and injuring 377 others. As many as 12,000 homes were damaged.