Terror in London?

Let's see, several explosions in the subway (the Tube) at rush hour, a train collision and an apparent bus bombing. Is it a "power surge" or a terrorist attack?

BBC

AP/NY Times

Pam's House Blend is covering the apparent attacks in great detail.

DW (Deutsche Welle) says 2 dead, 90 injured so far. More than one bus is involved.

UPDATE 9:30 AM DST: Now at least 40 people dead. Roundup of coverage at TMV (The Moderate Voice): London Subway Rocked by Terrorists' Blasts