Will Mumbai's triple blasts be solved?

Will the triple blasts in Mumbai be another addition to the array of unresolved cases?

Five attacks across various cities of the country since 26/11 terror attack on Mumbai have remained unsolved for investigators despite the fact that three of these cases are being handled by National Investigation Agency.

The Februrary 13 German Bakery blast in Pune, bombings at Chinnaswamy Stadium in Chennai on April 17 just hours before an IPL match, the shooting incident of Jama Masjid in September last year, low-intensity blast outside Delhi High Court and Varanasi Ghat bombing in December which killed a two-year-old girl are yet to be unravelled.

The NIA, which was set up by Home Ministry to probe terror-related cases across the country, does not have any concrete success to show for in three of these cases handled by it -- Jama Masjid shooting, Varansi Ghat bombing and Chinnaswamy Stadium bombing.

The remaining two-- High Court blast and German Bakery blast -- have been investigated by the local police.

Maharashtra Police has filed a charge sheet in German Bakery blast case in December last year making seven people accused. One person has been arrested in this case but ATS had not been able to prove conclusively his involvement in the incident.

The probe into these cases has revealed that all of them are linked and carried out by suspected members of banned Indian Mujahideen but do not have hard evidence to bring out their culpability.

However, a source in the Home Ministry say IM may be trying to re-group and these acts may be their efforts in that direction.