New Delhi, Aug 25: Expressing shock over the twin blasts in Mumbai, Deputy Prime Minister L K Advani said that the explosions looked like the handiwork of Simi in conjunction with the Lashkar-e-Toiba. "Mumbai has been facing such blasts since November last year. In all these cases, the organisation involved was found to be with Simi acting in conjunction with LeT. Today's blast also looks like the handiwork of Simi. However, only investigation's into today's blasts will establish who are behind these explosions. Advani also expressed shock over the blasts and called the developments alarming, especially since the number of casualties is very high. Bureau Report