By Brian R. Ballou and John R. Ellement Globe Staff

CONCORD -- Waltham Police Chief Thomas M. LaCroix allegedly assaulted his wife and a female neighbor during two separate violent incidents Tuesdayin Maynard where he lives, a Middlesex prosecutor said today when LaCroix was arraigned in his bed at Emerson Hospital.

LaCroix was arrested by Maynard police Thursday around 4:30 p.m. and has been placed on administrative leave with pay, according to Mayor Jeannette A. McCarthy and Maynard police.

According to Middlesex Assistant District Attorney Suzanne Kontz,paperwork filed in Concord District Court and Maynard police, LaCroix assaulted his wife, Andrea K. LaCroix on Tuesday, an attack that required her to get medical treatment at Newton Wellesley Hospital.

Kontz also said during LaCroix’s arraignment in his hospital room that after her husband allegedly attacked her, Andrea LaCroix went to a female neighbor’s house. That female neighbor returned with Andrea LaCroix to the LaCroix home - where Thomas LaCroix allegedly attacked the neighbor.

Only limited details of the incidents were made public today because the police report and most records were impounded. No official explanation was immediately provided for the gap of time between the violent incident -- Tuesday -- and LaCroix’s arrest on Thursday.

In one document made public, 40-year-old Andrea LaCroix was identified as one of the victims and prosecutors said they wanted a court order for her medical records created at Newton Wellesley hospital between June 11 and June 14.No description of Andrea LaCroix’s injuries were disclosed.

At his arraignment, LaCroix was ordered held without bail pending a dangerousness hearing now set for Tuesday at 2 p.m. at the Concord courthouse.