Kabul (AP) — Afghan police say that a bomb hidden in a parked motorcycle has exploded outside a police training center in western Afghanistan, killing two security guards.

Herat province police spokesman Noor Khan Nikzad says Wednesday's blast in Adraskan district also wounded six guards. He did not provide further details.

No one immediately claimed responsibility for the attack, but it matched the pattern of Taliban strikes that typically target Afghan forces or government workers.