A federal judge said he is likely to reject a $1.1 billion class action settlement that Bayer AG reached last month to resolve future lawsuits over its pesticide Roundup.

In a Monday order, U.S. District Judge Vince Chhabria, who has scheduled a July 24 hearing on the settlement's preliminary approval, said he would not extend a July 13 deadline for class members to object to the proposed deal.

"However, even before receiving opposition briefs, the court is skeptical of the propriety and fairness of the proposed settlement, and is tentatively inclined to deny the motion," he wrote.