Police are searching for an active gunman at a high school in Texas.
All schools in the district were placed on lockdown as police hunt the shooter who reportedly attacked at Alpine High School.
One person is reported to have been shot, according to CNN, though a police dispatcher was unable to confirm that.
Another local media channel showed students at the high school apparently being evacuated.
There were reports that the local Brewster County police believe there could be two gunman on the run, though this has not been confirmed.
A spokesman for the police force told ITV News that they were hunting a gunman at the high school but declined to give further details.
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The pilot in charge of a hot air balloon that crashed on Saturday, killing all 16 people on board, has been named as Skip Nichols.
It is believed the 16 people were aboard for an hour-long flight arranged by the Heart of Texas Hot Air Balloon Rides company.
Mr Nichols is believed to be the company's chief pilot.
The accident is likely to be one of the deadliest hot air balloon crashes on record.
Officials have confirmed that 16 people were killed when a hot air balloon crashed in Texas.
The Texas Department of Public Safety confirmed that nobody survived the crash, which is believed to have happened after a fire broke out in the balloon's basket.
An eyewitness to a fatal balloon crash in Texas which is believed to have killed 16 people described the scene as a "huge fireball".
Margaret Wylie, who lives near the crash site, said she believed that before it crashed the balloon hit high power lines, which caused popping sounds like a gun going off.
"It went up like a big fireball," she described.
The wreckage of the balloon appears to rest under a number of power lines.
A "number of deaths" have been confirmed in a hot air balloon crash in Texas.
An investigation has now been launched after the balloon, believed to be carrying 16 people, caught on fire before crashing near Lockhart around 8.30am local time, according National Transportation Safety Board official Erik Grosof.
Texas's Governor offered his sympathies to the families of those believed to have been killed in a hot air balloon crash in America.
On Saturday, the Federal Aviation Administration confirmed a balloon carrying at least 16 people had caught fire and crashed near to Lockhart, Texas, at roughly 8.30am.
There are not thought to be any survivors, according to a local sheriff.
"Our thoughts and prayers are with the victims and their families, as well as the Lockhart community," Governor Greg Abbott said.
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