(In July 29 story, corrects second paragraph to read north of Toronto instead of south)

(Reuters) - Four counts of first-degree murder have been laid against a 23-year-old man who was arrested at a home where three women and a man were found dead, Canadian police announced on Monday.

Menhaz Zaman was taken into custody at the scene of the crime on Sunday, when York Regional Police (YRP) responded to a call shortly before 3 p.m. EDT to a residence in Markham, Ontario, 30 km (18.6 miles) north of Toronto.

Upon arriving they found three women and one man dead. Police have declined to identify the deceased, or the cause of death.

“We do believe that the man we have in custody that’s now been charged is responsible for these murders,” Andy Pattenden, a media relations officer with the YRP, told reporters on Monday.

City News in Toronto reported that the four victims were family members of Zaman, but this has not been confirmed by police or the coroner’s office.

The coroner’s report is expected within a couple of days, Pattenden told Reuters, after which police will release the identities of victims.

Police are not searching for further tips on the case.

Zaman appeared in an Ontario courtroom on Monday and police said he is expected to reappear in court via video link on Aug. 2.