SAN ANTONIO -- Tejano singer Emilio Navaira is slowly regaining consciousness, hospital officials in Houston said Thursday.

According to Memorial Hermann-Texas Medical Center, Navaira opened his eyes and moved his arms and legs on Wednesday night.

While Navaira's condition has improved, he remains in critical condition, hospital officials said.

Navaira was critically injured early Sunday after his band's bus crashed near Houston.

Since then, the singer has undergone two surgeries.

The band's bus slammed into traffic barrels in the Houston suburb of Bellaire, west of downtown Houston. Navaira, 45, was one of eight people injured in the crash.

Two others were transported to Memorial Hermann with less severe injuries, treated and released. The other five were taken to Ben Taub Hospital, where two are listed in critical condition, Longoria said.

Navaira's brother, Raul Navaira , was one of those injured in the crash -- he was discharged.

Navaira , known as Emilio to his fans, gained fame in Tejano circles after performing at the first Go Tejano Day at the Houston Livestock Show & Rodeo in 1990. The performance set a then-record of attendance with 51,072 people. He went on to play at Rodeo Houston in 1995 with Selena, as well as in 1997, 1999 and 2007.

Navaira is a San Antonio, Texas, native who won a Grammy in 2003 for his album "Acuerdate."

Navaira and Rio have released more than a dozen albums.