Hundreds of Muslim refugees have converted to Christianity across Europe in recent years, according to church leaders, but motives vary.

In Austria, the rolls of Catholic churches swelled with Muslim immigrants, leading to new guidelines for baptism to ensure sincere faith. Other churches in Lebanon, Germany, and England also report growing numbers of Muslim refugee converts from Afghanistan, Iran, Syria, Iraq, Bangladesh, and Eritrea.

Bishop George Saliba of Beirut, Lebanon, told PRI he has baptized about 100 Syrian refugees since 2011. In another Beirut church, a pastor meets with Syrian refugees to teach them “Christian doctrines” from Scripture. He requested anonymity out of fear of Islamist reprisals but said dozens of Bible study groups for Syrian refugees now meet in Lebanon.

No national statistics exist, but many local churches across Europe attest to the influx of Muslim refugees seeking to become Christians. Still, they remain a small fraction of the millions of Muslims in Europe.

According to The Guardian, European mosques turned away many homeless and impoverished Muslim refugees seeking assistance. They found help and a warm welcome in churches.

Reasons for conversion vary, from “heartfelt faith,” to gratitude to the Christians assisting them, to hope that it could boost their chances for gaining asylum, The Guardian reported. One Muslim in Germany admitted to NPR he might convert in order to avoid deportation back to Afghanistan, where his “life will be in danger.”

But others appear sincere. A 25-year-old Iranian Kurd now called Silas told NPR studying Islam brought disillusionment. Reading the Bible for the first time in a camp on Germany’s border with Poland prompted questions. “By getting baptized we have to say goodbye to our home country because we can never go back. But we accept this. The Muslim god in Iran was angry and strict, but Jesus accepts us as we are,” an Iranian named Medhi told Germany’s Der Spiegel.