Police arrested a 32-year-old woman after she allegedly assaulted her 70-year-old boyfriend with a metal pipe in Waianae.

Police said the suspect struck her boyfriend with the pipe at about 4:25 p.m Tuesday. The man suffered a cardiac arrest and was transported to a hospital in critical condition.

Police said his condition was later upgraded to “serious but stable condition.”

Police arrested the 32-year-old woman in Waianae shortly after on suspicion of second-degree assault.