The Jerusalem Magistrate's Court on Thursday extended the remand of the Jerusalem exterminator who is alleged to have negligently sprayed toxic material in the apartment of a family of six that left two sisters dead.The suspect, who will be under house arrest for an additional three days, has been cooperating with authorities, and Judge Yitzhak Shimoni has already determined that he does not pose a risk.Abigail and Yael Gross were laid to rest Thursday afternoon, while their brothers, Michael, 7, and Yitzhak, 5, continue to fight for their lives. They are listed in critical condition.