WASHINGTON, May 15 (UPI) -- The sweeping immigration reform bill was amended by a U.S. Senate committee to tighten student visa rules in the wake of the Boston Marathon bombings.

The Judiciary Committee, trying to get its work on the bipartisan measure completed by the end of the week, also on Tuesday fought off proposals that threatened the fragile compromise reached by the so-called Gang of Eight, the bipartisan group of senators who drafted the legislation, the Los Angeles Times reported.