Protesters clashed with police in central Athens during a second day of demonstrations Thursday, as lawmakers prepared to vote on creditor-demanded measures that will impose additional income losses for many Greeks for another three years.

A small number of masked youths broke out from a crowd of about 15,000 people protesting peacefully outside parliament and threw gasoline bombs at riot police, who responded with tear gas. No injuries or arrests were immediately reported.

The evening protest was organized by major trade unions.

In the morning, hundreds of pensioners braved heavy rain and marched to parliament to express their anger at the latest planned cuts to their incomes.

“No more tax theft,” they chanted. Pensions have been cut sharply over the past seven years as successive Greek governments have slashed spending in return for bailout money to avoid bankruptcy.

The protests came a day after a general strike disrupted services across the country. Ongoing stoppages have kept ferries tied up in port for three days and played havoc with public transport.

Left-wing Prime Minister Alexis Tsipras is seeking parliamentary approval for the pension cuts and further tax hikes through 2020, as part of an agreement with international bailout creditors to release the next bailout installment.

Without the funds, Greece would struggle to meet its debt servicing obligations in July.