A 31-year-old man was critically injured Saturday night after being shot in Nuuanu, Honolulu police said.

The drivers of two vehicles were involved in an argument at 7:28 p.m., police said.

The victim stopped his vehicle and walked up to the suspect’s vehicle. The suspect produced a firearm and fired several rounds from inside his vehicle at the victim, causing serious injuries, police said. The suspect then fled.

Honolulu Emergency Services officials said paramedics treated the man for multiple gunshot wounds and took him to a hospital in critical condition.

No arrests had been made in the case, police said Sunday. The incident is being investigated as an attempted murder, said police, who initially reported the case as “possibly related to road rage.”

But later Sunday, police said the incident may have been more than a road rage argument.

“From my understanding, it was supposedly a robbery that went sideways,” HPD Lt. P. Phromsiri told the Honolulu Star-Advertiser by phone.

However, no further details about this incident — including a suspect description, the exact location of the shooting, or an update on the condition of the victim — were immediately provided to the Star-Advertiser.