Exclamation Mark

A warning sign with an exclamation mark and a 404 error icon.

404 With Warning Sign

The word "vote" with an exclamation mark.

Two warning icons: an exclamation mark and a cross inside a square.

An exclamation point symbol or warning sign in a circle.

A round speech bubble with punctuation marks: an interrogation mark and an exclamation mark. 

A speech bubble with an exclamation mark.

A speech bubble with an exclamation mark in it.