A 4-year-old boy nearly drowned Saturday evening at an east-side apartment complex swimming pool.

A resident of the complex in the 6100 block of East Pima Street called 911 at about 6 p.m. Saturday requesting help, Capt. Jeff Langejans of the Tucson Fire Department said in a news release.

Crews arrived four minutes later and found the child with blue skin, coughing and crying, Langejans said.

A resident spotted the boy face down in the pool, jumped in and brought him to the side of the pool. The boy was unconscious and unresponsive.

CPR efforts were administered immediately, and the boy began to spit up water and breathe on his own. A fire crew arrived and rushed him to a hospital, where his condition improved.

Authorities estimate the boy was underwater for about one minute.

Information about his prognosis was not available Saturday.

Drowning is the No. 1 cause of unintentional death for children ages 1 to 4. It's important to remember that it only takes a few seconds for someone to slip underwater, Tucson Fire Department officials say.