Two men were injured Tuesday in a head-on collision near the entrance to the Koolau Center in Ahuimanu.

A 59-year-old man was critically injured when the 2011 Honda Civic he was driving crossed the centerline and crashed head-on into a 2009 Chevy tow truck driven by a 24-year-old man.

The Honda was headed northbound on Kahekili Highway and the tow truck was headed southbound when the crash occurred at 12:30 p.m. near the intersection of Hui Iwa Street.

Police said that a 2016 Toyota 4Runner then rear-ended the tow truck. The Toyota driver, a 49-year-old man, was in stable condition, police said.

The Honda driver was taken in critical condition and the 49-year-old was taken in stable condition to The Queen’s Medical Center, police said.

But Emergency Medical Services, which transported the two men, described the 49-year-old’s condition as serious.

Police said it is unknown whether speed or alcohol were factors.

Suspect is arrested in assault in Waikiki

Police arrested a 59-year-old man after he allegedly assaulted a 52-year-old man in Waikiki.

Police said the suspect used an unspecified dangerous instrument and struck the victim on the head just before 4:30 p.m. Monday. The victim was transported to The Queen’s Medical Center with non-life-threatening injuries.

Police arrested the 59-year-old shortly afterward on suspicion of second-degree assault.