The car attack outside UK’s Houses of Parliament this week is eerily similar to the one last year that left five people dead — and now authorities are looking into whether the two are related.

Salih Khater was arrested on attempted murder charges for plowing his Ford Fiesta into cyclists in Westminster in London, leaving three injured.

The latest terror attack occurred just steps from the site of one in March 2017, when Khalid Masood rammed his vehicle into a crowd walking along Westminster Bridge.

Four were killed in the March 2017 attack. Masood stabbed a police officer to death before being shot dead.

Khater and Masood lived 10 minutes away from each other in the Sparkbrook section of Birmingham, the Telegraph reported.

Authorities searched two addresses in Birmingham on Tuesday and were at a third address Wednesday. Another location in nearby Nottingham also was searched.

Khater, 29, may have been doing reconnaissance in Westminster when an ambulance pulled up behind him with its sirens blaring — spooking him into suddenly barreling his car into the crowd at 7:37 a.m.

He allegedly drove through the night from Birmingham to London and toured the areas of Westminster, Whitehall and Tottenham Court Road, the Telegraph said.

The son of Sudanese farmers came to the UK in 2010 as a refugee and was granted asylum, BBC News reported.

His brother, Abdullah Khater, insisted that he had no links to terror or religious organizations.

Salih Khater studied electrical engineering at Sudan University of Science and Technology. His father died a few years ago.

He also studied accounting at Coventry University in England from September 2017 until May of this year, but was kicked out for failing his first year, the school told the Telegraph.

Neighbors at his Highgate address — where he moved four months ago — were stunned over the attack. They described him as a quiet but good man.

“I couldn’t see him doing anything stupid like that,” said one neighbor, who only gave his name as Adam.

Ali Mohamed, a member of the Sudanese community in Birmingham, said he believed Salih Khater had an appointment at the Sudanese embassy to apply to travel back to Sudan.

With Post wires