Midland City, Alabama (CNN) - As an armed standoff entered its fifth day Saturday, authorities negotiated through a ventilation pipe with a man accused of barricading himself and a 5-year-old hostage in an underground bunker in southeastern Alabama.

Police have been tight-lipped about a possible motive since the hostage drama began unfolding in Midland City with the shooting of school bus driver and the abduction of the 5-year-old.

In a sign of perhaps how tense negotiations are between authorities and the suspect, officials have refused to detail what, if any, demands have been made by the suspect.

On Friday, the Dale County sheriff did confirm what neighbors have been saying and news outlets around Midland City have been reporting since the standoff began - the suspected gunman's identity.