WARSAW, Oct 15 (Reuters) - Poland's Orlen has placed an offer to buy all shares of Grupa Azoty Polyolefins (GAP), a petrochemical unit of state-controlled chemical group Grupa Azoty, the oil refiner said on Wednesday. Orlen, which currently owns 17.3% of GAP, said its offer is valued at 1.02 billion zloty ($278.20 million). ($1 = 3.6664 zlotys) (Reporting by Marek Strzelecki) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)
