02/12/2013 05:42 EST | Updated 04/14/2013 05:12 EDT

Edmonton police investigating boy's death at south-side apartment building

EDMONTON - Edmonton police say they are treating the death of a seven-year-old boy as a homicide.

An autopsy was conducted Tuesday afternoon but the cause of death is not being released, although they said earlier in the day the boy had appeared to have drowned.

Police spokeswoman Clair Seyler says a 32-year-old woman has been arrested but no charges have yet been laid.

EMS was called to an apartment on Edmonton's south side about 8:30 a.m. Tuesday after receiving a call about a sudden death.

The boy was transported to hospital but was pronounced dead shortly after arrival.