According to senior World Bank officials, Pakistan practised extensive economic discrimination against East Pakistan: greater government spending on West Pakistan, financial transfers from East to West Pakistan, the use of East Pakistan's foreign-exchange surpluses to finance West Pakistani imports, and refusal by the central government to release funds allocated to East Pakistan because the previous spending had been under budget; though East Pakistan generated 70 percent of Pakistan's export revenue with its jute and tea. Sheikh Mujibur Rahman was arrested for treason in the Agartala Conspiracy Case and was released during the 1969 uprising in East Pakistan which resulted in Ayub Khan's resignation. General Yahya Khan assumed power, reintroducing martial law.