How to drop multiple triggers in a PostgreSQL 9.1 DB

I'm trying to remove multiple triggers but getting a SQL error:

PG::Error: ERROR:  syntax error at or near ";"
LINE 1:     DROP TRIGGER rr_admin_reports;

Here is the sql I'm executing in rails:

sql = <<-SQL
  DROP TRIGGER rr_admin_reports;
  DROP TRIGGER rr_apps;
  DROP TRIGGER rr_attachments;
SQL

Is there a way to easily delete a long list of triggers? Thanks