Spain's centre-right People's Party was heading to a landslide victory in Sunday's parliamentary election, taking 44 percent of the vote, or 187 seats in the lower house, with 78 percent of polling stations counted.

The Socialists were trailing with 29 percent of the vote, or 109 seats in the 350-seat lower house, the interior ministry said in results posted on its website.

(Reporting By Fiona Ortiz; Editing by Paul Day)