SALT LAKE CITY (AP) — Identical twins sisters Kerri Bunker and Kelli Wall each recently gave birth to identical twins -- again.

Bunker and Wall delivered twins within weeks of each other at Timpanogos Regional Hospital. They delivered their first sets of twins, now 4- and 5-year-olds, at the same hospital a few months apart. Bunker also has a 2-year-old child.

The youngest Bunker twins were born Feb. 13. The youngest Wall twins were born about three weeks earlier. The 36-year-old women are not just sisters but best friends, neighbors and co-workers.

Although they currently live down the street from one another, they are in the process of building a house so they can live next to each other in Wallsburg. They say all nine kids will grow up together.