NEW : White House press secretary condemns Syrian opposition . Riad Seif , a one-time Syrian lawmaker once said to have the appeal and charisma of South African statesman and former freedom fighter Nelson Mandela , was arrested during demonstrations close to the Al Hasan mosque in Maydan , a suburb of the capital . At least 10 security forces were killed in Homs , state news agency says . Ten civilian deaths across Syria on Friday , activist says . Opposition figure Ali Abbas is arrested , his wife killed .
NEW : White House press secretary condemns Syrian opposition . At least 10 security forces were killed in Homs , state news agency says . Ten civilian deaths across Syria on Friday , activist says . Opposition figure Ali Abbas is arrested , his wife killed .