SEATTLE (AP) — Seattle-King County officials have launched an investigation after seven children under the age of 14 became sick from E. coli over a two-week period last month. KOMO-TV reported that six of the children were hospitalized, including one who developed a potentially lethal type of kidney complication. That child is now recovering after receiving treatment and another child is now believed to have the same complication. Health officials said the children became sick between April 17 and April 29. Public Health Seattle-King County is conducting interviews to identify potential common exposures. It remains unclear if the cases involve the same source of infection.