Police arrested a 47-year-old man after he allegedly assaulted his neighbor with a fiberglass pole in Waimanalo.

The assault occurred sometime between 9:55 a.m. and 10:20 a.m. Tuesday. Police said the victim, a 58-year-old man, sustained a welt to his chest and a swollen cheek.

It was not immediately clear what motivated the attack.

Police arrested the suspect at a home on Inoaole Street on suspicion of second-degree assault.