Narendra Modi is to be sworn in as India's prime minister in a ceremony attended by a slew of foreign dignitaries — including the prime minister of archrival Pakistan.

Some observers say Monday's swearing-in could signal an easing of tensions between the nuclear-armed neighbors. Pakistani Prime Minister Nawaz Sharif accepted Modi's invitation on Saturday.

Pakistan and India have a history of uneasy relations and have fought three wars over the disputed Himalayan region of Kashmir since their independence from Britain in 1947.

Modi and his Bharatiya Janata Party won a resounding victory in general elections. Modi has promised to revitalize the economy and restore India as a leading global power.