'Dignity and strength': Chan, Sukumaran sang songs of praise as they walked to their deaths

Executed Bali Nine ringleaders Andrew Chan and Myuran Sukumaran sang songs of praise as they faced the firing squad.

The Melbourne-based husband of Pastor Christie Buckingham, who is in Indonesia, said she sent him a text message following the executions saying the men conducted themselves with "dignity and strength until the end".

"She told me the eight of them walked out onto the killing field singing songs of praise," Rob Buckingham told 3AW radio.

There were concerns Ms Buckingham wouldn't be allowed to see the men before their deaths, but a last-minute reprieve allowed her to read them their last rites, Mr Buckingham said.

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Pastor Karina de Vega said all eight members of the group sang songs including Amazing Grace.

"They were praising their God," Pastor de Vega told Fairfax Media.

"It was breathtaking. This was the first time I witnessed someone so excited to meet their God."

The Australian pair was executed at 12.25am (3.25am AEST), along with six other death row inmates on the infamous "death island" Nusa Kambangan.

Local Catholic priest Charlie Burrows, who acted as spiritual adviser to Brazilian inmate Rodrigo Gularte, said none of the eight prisoners wore blindfolds as they faced their executioners.