sentences:  The technical investigation found that many, but not all, major Pakistani fixed-line and mobile service providers implemented the YouTube restriction which was lifted by the PTA the following day when protests abated after the resignation of Minister for Law and Justice Zahid Hamid.The video claiming responsibility for the 2010 Moscow Metro bombings, which quickly gained 800,000 views in four days, was removed, along with all videos of Doku Umarov.Additionally, it turned out that over 300 videos from the Kavkaz Center were removed for having "inappropriate content."