MIAMI (AP) - A federal judge has declared another mistrial against six men accused of plotting to spark an anti-government war by toppling Chicago's Sears Tower and bombing FBI offices.

U.S. District Judge Joan Lenard ordered a mistrial Wednesday when jurors reported they were hopelessly deadlocked after 13 days of deliberation in the case of the so-called "Liberty City Seven." The first trial ended in a mistrial in December because of a hung jury for the same six defendants and the acquittal of a seventh.

The six defendants could have faced up to 70 years in prison if convicted of four conspiracy charges.

It's not clear what the prosecution's next step will be.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

MIAMI (AP) - A jury in Miami will try again to reach a decision on six men accused of scheming to blow up Chicago's Sears Tower and bomb FBI offices.

Wednesday is their 13th day of deliberations.

Jurors sent a second note to the judge Tuesday saying they were deadlocked. But the judge sent them back to the jury room to keep trying.

A hung jury forced a mistrial in December. One of the so-called "Liberty City Seven" was acquitted after that first trial.

The six defendants face 70 years in prison if convicted of four conspiracy charges.