Turkey says Kurdish militants may be behind deadly soccer bombing (Reuters)

* Attacks came two hours after end of soccer match* Explosions less than a minute apart* Most of those killed were police officers* Erdogan cancels overseas trip, flags to fly half mast(Recasts with comments from Deputy PM)By Humeyra Pamuk and Tuvan GumrukcuISTANBUL, Dec 11 (Reuters) - Turkey said on Sunday that Kurdish militants may be responsible for the two bombs that killed 29 people and wounded 166 in an apparent coordinated attack on police outside a soccer stadium in Istanbul after a matc