A person is guilty of assault in the third degree when:

1. 1. With intent to cause physical injury to another person, he causes such injury to such person or to a third person; or
2. 2. He recklessly causes physical injury to another person; or
3. 3. With criminal negligence, he causes physical injury to another person by means of a deadly weapon or a dangerous instrument. Assault in the third degree is a class A misdemeanor.