New Delhi, Sept 30: Nineteen companies, including seven foreign companies, have submitted bids for oil and gas blocks offered under the fourth round of national exploration licensing policy (NELP). Zaruefneft of Russia, UK-based British Gas and Aban Llyods, and Canaro Resources of Canada were among the companies that bid for the 24 oil and gas blocks offered under NELP-IV, official sources said on Tuesday. Bureau Report