The Associated Press

CORPUS CHRISTI, Texas (AP) - Officials overseeing the cleanup of gooey oil blobs on South Texas beaches said the work was expected to be completed Friday and the muck is believed to have come from the same unknown source.

Tar-like blobs as big as basketballs were first reported washing up more than a week ago. Jim Suydam, a spokesman for the Texas General Land Office, said more weathered blobs were washing up as late as Thursday.

The blobs were scattered along about 155 miles of coast, from Matagorda Island to the mouth of the Rio Grande, Suydam said. The Land Office worked with the U.S. Coast Guard on the cleanup.

The last of the cleanup is on a portion of the Padre Island National Seashore, Suydam said.

He told The Associated Press that officials were still trying to determine where the oil came from and exactly what kind of oil it is. They also were looking at shipping records and Gulf of Mexico currents to determine the source.

The responsible party might be forced to pay for the cleanup, Suydam said.

One bird was killed by the oil, he said.