Two buses have been in a crash on the Great Western Highway, seeing a school bus full of children affected.

The school bus was allegedly crashed into by an empty bus in Warrimoo, with several students injured and receiving treatment from paramedics. NSW Police have confirmed two children have been taken to Westmead for minor injuries, as well as a further five children to Nepean for minor injuries.

Motorists are told to avoid the Great Western Highway in both directions, with it currently shut. Alternative routes are available.

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