Can we immediately do a Samyama intending the terrorists to surrender without shooting any more hostages or the police. Alternatively, for the hostages to overpower the terrorists when they aren't alert and bring them down.
i personally do practice samyama and think that asking for such a thing might be a bit too much. (it's like asking the same thing when a war or a guerilla warfare breaks out here in the middle east or like the one between russia and georgia)
let's just say it will ease the suffering and perhaps who knows it might lead things to a better ending for the long future. (a settlement between both sides perhaps)