US President Donald Trump sparked outrage for expressing his condolences for the wrong mass shooting overnight after six people were fatally shot and at least ten injured in Northern California.

“May God be with the people of Sutherland Springs, Texas. The FBI and Law Enforcement has arrived,” Mr Trump wrote.

The tweet was deleted from the President’s Twitter page, but not before his legion of followers expressed their disbelief and questioned the sincerity of his sentiments.

The Sutherland Springs shooting last week claimed the lives of 26 people and wounded dozens more

Wednesday’s mass shooting occurred in Rancho Tehama Reserve, California on Wednesday (AEST) when a gunman armed with a semi-automatic weapon and two handguns opened fire at multiple locations – including a school – killing six people before he was slain by police.

At least 10 other people were wounded in California, including two children at a school near the small town of Corning, about 70 kilometres north of Sacramento.

The latest tweet closely mirrored the one Mr Trump posted hours after the Texas shooting on Nov. 5, which read, “May God be w/the people of Sutherland Springs, Texas. The FBI & law enforcement are on the scene. I am monitoring the situation from Japan.”

May God be w/ the people of Sutherland Springs, Texas. The FBI & law enforcement are on the scene. I am monitoring the situation from Japan.

— Donald J. Trump (@realDonaldTrump) November 5, 2017

Twitter users quickly slammed Mr Trump, with many calling out his inability to remember each mass shooting that has taken place this year.

https://twitter.com/vbosch/status/930659624092549120

Other’s questioned whether the President was sincere in his condolences.

Did u just copy & paste this & forget to change the city?

— Joe C (@cadillaccannon) November 15, 2017

The US is mourning the victims of string of deadly rampages this year alone.

Gunman Stephen Paddock killed 58 people when he fired into a concert crowd from his Las Vegas hotel room in October, in what was the deadliest mass shooting in modern US history.

The Boston Globe produced figures after the Texas massacre showing that there had been 307 mass shootings in the US so far this year, with mass shootings defined as those involving four or more victims.

The ATF is sending special agents to the site of a church shooting in South Texas. https://t.co/mXGuMZWJ34 pic.twitter.com/FMrs1vRMbK

— The Boston Globe (@BostonGlobe) November 5, 2017