NEW DELHI - A powerful bomb placed in a briefcase outside the High Court in New Delhi killed at least 10 people and wounded 50 on Wednesday in an attack authorities said was claimed by a Bangladeshi-affiliated Islamist group.

The bomb dug a crater near the main reception counter where passes are issued for lawyers and visitors to enter the sprawling sandstone building before the main security checkpoint.

Indian authorities said the outlawed Harkat-ul-Jihad Islami (HUJI) militant group, with bases in Bangladesh and Pakistan, had sent an e-mail claiming responsibility.